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Dr. Joshua Klein

Fertility Medicine
Brooklyn, NY
17 years experience male

Locations

Reproductive Medicine Associates of New York - Brooklyn

Brooklyn, NY

Address

26 Court Street, Suite 2710, Brooklyn, NY
Directions

Practice website

Fax

2127565777

Office

New York, NY

About

Bio

Dr. Joshua U. Klein is a Reproductive Endocrinologist and fertility specialist who leads RMA of New York’s Brooklyn office. Dr. Klein specializes in treating infertile couples using both basic and advanced technologies. He has extensive clinical and research experience in all aspects of fertility, including the treatment of reproductive and ovarian aging, reproductive disorders such as polycystic ovarian syndrome (PCOS), and the integration of clinical, genetic, and molecular data to improve IVF outcomes. Dr. Klein is also a skilled reproductive surgeon, and is well respected for his compassionate patient care. Dr. Klein earned his medical degree from Harvard Medical School. He served as Clinical Instructor in Obstetrics, Gynecology and Reproductive Biology at Brigham and Women's Hospital and Massachusetts General Hospital, and his residency program was subsequently featured in the 2010 ABC mini-series “Boston Med.” Dr. Klein completed his fellowship training in Reproductive Endocrinology and Infertility at New York Presbyterian Hospital - Columbia University Medical Center in New York City. Dr. Klein has received numerous awards for his academic accomplishments and medical research. He was selected as a biomedical research fellow in the prestigious Darnell Laboratory at Rockefeller University in New York City. Dr. Klein was awarded the Harvard OB/GYN Resident Teaching Award, and as Chief Resident, was honored by the Brigham and Women’s Hospital Midwifery Group for his efforts as a consulting physician. He has also been recognized as a "Top Doc" by Health Magazine. Dr. Klein is an accomplished lecturer and author and has written numerous scientific research articles and book chapters in leading medical journals and textbooks. He has presented many of his research findings at national meetings, including the American Society for Reproductive Medicine (ASRM). He has also written widely for general audiences in publications including Health Magazine, CNN.com, US News and World Report, the Boston Globe, the Huffington Post, and Livestrong.com. Dr. Klein is also the founding editor of Fertility Reviews, an online journal reviewing the latest research and developments in fertility and IVF.

Specialties
Doctors may have more than one area of specialty interest. Board certification in a specialty area means the doctor has completed formal training and has practice experience in that specialty, and has passed the certification examination from the corresponding accredited medical specialty board.

Fertility Medicine

Languages spoken

English

Doctor Q&A

49 Answers
14 Agrees
The number of answers this doctor has agreed with.
A 36-year-old female asked:
Dr. Joshua Klein
Fertility Medicine 17 years experience
Maybe: If you are sure you ovulated 6 days ago, it would be very unusual to be getting your period already, and if so, you might have a "luteal phase deficie... Read More
A 45-year-old member asked:
Dr. Joshua Klein
Fertility Medicine 17 years experience
Not long: Usually a woman will resume ovulation within 1-3 months of stopping a birth control pill. If it takes much longer than this, you should see your docto... Read More
A 33-year-old female asked:
Dr. Joshua Klein
Fertility Medicine 17 years experience
Unfortunately not: Your HCG levels do not sound like they can be consistent with a healthy pregnancy, particularly an ivf pregnancy when we know exactly how far along yo... Read More
A 21-year-old member asked:
Dr. Joshua Klein
Fertility Medicine 17 years experience
Maybe: I dont know which treatment you are considering, but there are many medications (most commonly used for cancer chemotherapy or immunologic/rheumatolog... Read More
A 31-year-old member asked:
Dr. Joshua Klein
Fertility Medicine 17 years experience
Within a week: Typically 2-7 days. If no period in 10-14 days see your doc for further testing. Good luck!
A 20-year-old member asked:
Dr. Joshua Klein
Fertility Medicine 17 years experience
Could happen: While it is unlikely to pregnant unless you ejaculate inside your girlfriend, strange things happen- all the time. "pre-ejaculate" fluid might contain... Read More
A 23-year-old member asked:
Dr. Joshua Klein
Fertility Medicine 17 years experience
Should not matter: Your weight should not affect whether a home pregnancy test is positive. If you have always been regular but havent had a period for a few months, you... Read More
A 20-year-old member asked:
Dr. Joshua Klein
Fertility Medicine 17 years experience
Not really: Birth control pills do not have long term effects on fertility. No matter how long you used the pill, you menses/ovulation/fertility should return to ... Read More
A 32-year-old member asked:
Dr. Joshua Klein
Fertility Medicine 17 years experience
Yes: Tubal sterilization, while very effective, is not 100% effective (depending on the precise surgery done, it is 95-99% effective). If you miss you peri... Read More
A 29-year-old female asked:
Dr. Joshua Klein
Fertility Medicine 17 years experience
Ask your RE doc: Most women will get a period within 2-7 days of stopping Progesterone after a failed ivf. Most re's will want you to wait at least one cycle (meaning ... Read More
A 21-year-old member asked:
Dr. Joshua Klein
Fertility Medicine 17 years experience
May be easy!: Most women with pcos have a very good chance of ultimately getting pregnant, if they get the right help. If you are not ovulating regularly, an ovulat... Read More
A 22-year-old member asked:
Dr. Joshua Klein
Fertility Medicine 17 years experience
It depends!: There are lots of possibilities! roughly one-third of the time there is a "female" problem (ovulation problems, blocked tubes, etc), one-third of the ... Read More
A 43-year-old member asked:
Dr. Joshua Klein
Fertility Medicine 17 years experience
Depends: You should talk with your doctor. Did you have regular/monthly periods before your ivf? Ivf does not routinely disrupt your periods after the first 1-... Read More
A 34-year-old member asked:
Dr. Joshua Klein
Fertility Medicine 17 years experience
Good question: There are numerous possible causes of elevated prolactin, some of which or not important/dangerous and/or don't need to be treated. If the prolactin i... Read More
A 22-year-old member asked:
Dr. Joshua Klein
Fertility Medicine 17 years experience
Not many: Many, if not most people who need help getting pregnant only find this out once they start trying to have a child! there are a few obvious tipoffs, li... Read More
A 37-year-old member asked:
Dr. Joshua Klein
Fertility Medicine 17 years experience
Safety + children: Depending on the specifics, a woman with sickle cell may need a "high-risk" OB when she gets pregnant. Also, sickle cell is usually inherited; using i... Read More
A 30-year-old member asked:
Dr. Joshua Klein
Fertility Medicine 17 years experience
Not really: It is important to supplement Folic Acid when you are trying to conceive as this can reduce the risk of a pregnancy complication called neural tube de... Read More
A member asked:
Dr. Joshua Klein
Fertility Medicine 17 years experience
Ovulation problem : You may not be ovulating regularly, and therefore are not getting pregnant but also not getting a period. If you go more than 2-3 months without a per... Read More
A 22-year-old female asked:
Dr. Joshua Klein
Fertility Medicine 17 years experience
Usually 10 days: If you have regular 28 day cycles, you probably ovulate on about day 14, and you fertile window lasts from about day 11 to day 14. If you want to be m... Read More
A 22-year-old female asked:
Dr. Joshua Klein
Fertility Medicine 17 years experience
Not really: Prenatal vitamins, specifically Folic Acid ("folate"), helps ensure that once you conceive the pregnancy will be healthy. But prenatal vitamins themse... Read More
A 36-year-old member asked:
Dr. Joshua Klein
Fertility Medicine 17 years experience
Depends: There are times when ivf is the only realistic option (e.g. Women with blocked tubes not amenable to surgical correction, men with extremely low sperm... Read More
A 25-year-old member asked:
Dr. Joshua Klein
Fertility Medicine 17 years experience
Talk to your RE :): Lots of possibilities. Did your partner/husband get his sperm tested? Has your anatomy/fallopian tubes been checked by an imaging test (e.g. Hysterosa... Read More
A 27-year-old member asked:
Dr. Joshua Klein
Fertility Medicine 17 years experience
Could be: I hope so! you should check a home pregnancy test. If it is positive, and/or if the pain continues/worsens and/or if you start bleeding, you should co... Read More
A 25-year-old member asked:
Dr. Joshua Klein
Fertility Medicine 17 years experience
Unlikely...: When did you get the Mirena (levonorgestrel) placed? It is very common to have irregular bleeding (light or heavy) for 3-6 months after placement. Alm... Read More
A 47-year-old female asked:
Dr. Joshua Klein
Fertility Medicine 17 years experience
A qualified no: A very recent study did show a possible association between fertility medication and a specific type of low-risk ovarian cancer. It is unclear if this... Read More
A 26-year-old member asked:
Dr. Joshua Klein
Fertility Medicine 17 years experience
No: Taking the "morning-after pill" should have no effect on the risk of ectopic pregnancy; if anything, it should decrease the risk of ectopic pregnancy ... Read More
A 26-year-old female asked:
Dr. Joshua Klein
Fertility Medicine 17 years experience
Yes: Ok to take the Nexium (esomeprazole) while trying to conceive. The Nexium (esomeprazole) might interfere with absorption of the prenatal vitamin, so ... Read More
A 39-year-old member asked:
Dr. Joshua Klein
Fertility Medicine 17 years experience
Definitely: The most fertile days of the month are the day of ovulation and the day before ovulation. But the "fertile window, " during which it is possible to co... Read More
A 20-year-old female asked:
Dr. Joshua Klein
Fertility Medicine 17 years experience
OB/GYN or Specialist: Most ob/gyn's will feel comfortable initiating the testing to check if you have any issues with your fertility. If things come back abnormal, they wil... Read More
A 36-year-old female asked:
Dr. Joshua Klein
Fertility Medicine 17 years experience
Probably not: There are lots of possible reasons why your period might be a couple of days earlier/later or lighter/heavier than usual now and then. Rarely does thi... Read More
A 22-year-old female asked:
Dr. Joshua Klein
Fertility Medicine 17 years experience
Definitely: The most fertile days of the month are the day of ovulation and the day before ovulation. But the "fertile window, " during which it is possible to co... Read More
A 20-year-old female asked:
Dr. Joshua Klein
Fertility Medicine 17 years experience
Days 13-14: The most fertile days of the month are the day of ovulation (which happens 1-2 days after a urine ovulation predictor kit turns positive) and the day... Read More
A 22-year-old female asked:
Dr. Joshua Klein
Fertility Medicine 17 years experience
Track your ovulation: You can track your ovulation using basal body temperature, cervical fluid, or urine ovulation predictor kits. During the 4-5 days leading to ovulation... Read More
A 29-year-old female asked:
Dr. Joshua Klein
Fertility Medicine 17 years experience
Possibly: It is possible you had a very late ovulation this past month and therefore a pregnancy test would not be positive until much later than the expected t... Read More
A 24-year-old female asked:
Dr. Joshua Klein
Fertility Medicine 17 years experience
Possibly: Excess weight can negatively impact your fertility in multiple ways, including your egg quality, your ovulatory function, and your risk of miscarriage... Read More
A 35-year-old female asked:
Dr. Joshua Klein
Fertility Medicine 17 years experience
Definitely: The most fertile days of the month are the day of ovulation and the day before ovulation. But the "fertile window, " during which it is possible to co... Read More
A 29-year-old female asked:
Dr. Joshua Klein
Fertility Medicine 17 years experience
Get healthy!: In general, anything you can do to optimize your general health will increase your chances for an easy/healthy conception and pregnancy. Eat right, ex... Read More
A 23-year-old female asked:
Dr. Joshua Klein
Fertility Medicine 17 years experience
Just one: You dont need to wait longer than one full cycle before trying to conceive after a miscarriage and/or d&c. Good luck!
A 31-year-old member asked:
Dr. Joshua Klein
Fertility Medicine 17 years experience
Addendum: I agree with dr chenette, but would just add that, in direct answer to your question, there is no maximum numbe of cycles you can miss beyond which yo... Read More
A 33-year-old member asked:
Dr. Joshua Klein
Fertility Medicine 17 years experience
It depends: For younger women (younger than 35), we can use the traditional definition of 1 year or trying to conceive. For women 35-40, 6 months is enough time t... Read More
A 40-year-old member asked:
Dr. Joshua Klein
Fertility Medicine 17 years experience
It doesnt have to: Ivf, as opposed to using fertility medications with/without artificial insemination, actually gives you a lot of control over your risk of multiple pr... Read More
A 18-year-old member asked:
Dr. Joshua Klein
Fertility Medicine 17 years experience
See below: Symptoms of miscarriage (things you can feel/see) include abdominal/pelvic pain, vaginal bleeding, and perhaps a cessation of pregnancy symptoms (e.g.... Read More
A 22-year-old member asked:
Dr. Joshua Klein
Fertility Medicine 17 years experience
Fast!: In a "perfectly healthy" young (female age <30-35, male age <45) couple, the chance of conceiving (assuming having well-timed intercourse) is about 20... Read More
A 23-year-old member asked:
Dr. Joshua Klein
Fertility Medicine 17 years experience
Fertility specialist: Assuming your doctor completed all appropriate testing, you have what we would call "unexplained secondary infertility." although we dont know exactly... Read More
A 24-year-old member asked:
Dr. Joshua Klein
Fertility Medicine 17 years experience
Several possibilitie: It sounds like you need to see the endocrinologist. Possible explanations might include hypothalamic amenorrhea, non-congenital anatomic issues (e.g. ... Read More
A 40-year-old member asked:
Dr. Joshua Klein
Fertility Medicine 17 years experience
Hard to know: Thankfully, this is not a common situation, so there aren't good studies available to know what the chances of healing afterward will be. Your doc mig... Read More
A 25-year-old member asked:
Dr. Joshua Klein
Fertility Medicine 17 years experience
Many possibilities: You seem to have what we would call "secondary infertility" (infertility after previously having children). There are many possible explanations: did ... Read More
A 23-year-old member asked:
Dr. Joshua Klein
Fertility Medicine 17 years experience
Same as without: Signs of ovulation on Clomid (clomiphene) are the same as without clomid: growing follicle(s) on ultrasound, change in basal body temperature, lh surg... Read More
A 43-year-old member asked:
Dr. Joshua Klein
Fertility Medicine 17 years experience
Depends: The fertile days of the month are the day of ovulation plus 2-4 days prior to that. Women with 28 day cycles therefore are most fertile on days 11-14.... Read More

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Testimonials
Recommendations and Thank you notes are endorsements given from patients or other doctors.

2
Recommendations
210
Thank you notes
HealthTap member
Mar 30, 2015
Dr. Klein is an amazing doctor! #nationaldoctorsday2015 #virtualflower1
HealthTap member
Mar 31, 2015
Dr. Klein is an amazing doctor! #nationaldoctorsday2015 #virtualflower1
HealthTap member
thank you for your answer, my friends keep telling me it does, they cant believe im not pregnant. truthfully i think they want me more pregnant then i do lol.. thanks again
HealthTap member
This was very helpful. Thanks! I have this problem and for one and a half years so very helpful. Thank you
HealthTap member
Had an HSG and my other doc ruined my right tube for life. Not much chance of pregnancy at 40 now.

Education & Training

Medical/Graduate school

Harvard Medical School, MA
Graduated 2005MD
90,000 U.S. doctors in 147 specialties are here to answer your questions, provide medical advice, write prescriptions, and more.
Answer emailed
in 24 hours or less