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Dr. Derek Haas

Fertility Medicine
Dallas, TX
male

Locations

IVF Institute, P.A.

Dallas, TX

Address

7777, Forest Ln, Dallas, TX, US
Directions

My office hours

Wednesday: 9:00am - 5:00pm
Show more

Practice website

Fax

972-566-6860

Insurances accepted

Aetna

Blue Cross Blue Shield of Texas

UnitedHealthcare

Cigna

IVF Institure, P.A.

Richardson, TX

About

Bio

Dr. Haas moved to Dallas, Texas in 2001 to begin a three-year fellowship in reproductive endocrinology and infertility at the University of Texas Southwestern. His area of research during fellowship focused on ovarian physiology with special emphasis on polycystic ovarian syndrome. Dr. Haas presented his research findings at national meetings and had his work published in scientific journals (Fertility & Sterility, Molecular Endocrinology). Dr. Haas was in private practice for over 9 years in Irving, TX. He now practices in Richardson, TX and Dallas, TX. He believes that patients should play an active role in their medical care. He likes to create a non-stressful office environment so the patient enjoys their experience as much as possible. He specializes in all aspects of fertility treatment including ovulation induction, intrauterine insemination (IUI), surgery, 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

Licenses

United States: Texas

Languages spoken

English, Mandarin, Vietnamese

Doctor Q&A

246 Answers
41 Agrees
The number of answers this doctor has agreed with.
A 33-year-old female asked:
Dr. Derek Haas
Specializes in Fertility Medicine
Zika?: Did you mean the Zika virus? The only cases thus far in the U.S. were from people traveling to an affected area and then returning. You and your sex... Read More
A 22-year-old female asked:
Dr. Derek Haas
Specializes in Fertility Medicine
Not necessarily: It is still possible for a tube to pick up an egg from the opposite ovary. Sometimes the egg falls down into the pelvic cavity and the tube must reac... Read More
A 20-year-old female asked:
Dr. Derek Haas
Specializes in Fertility Medicine
Part of you: PCOS is not something you get rid of....it's something that's part of your nature. You can do things that keep your weight at a reasonable point like... Read More
A 28-year-old female asked:
Dr. Derek Haas
Specializes in Fertility Medicine
Missing your period: Missing your period at the expected time is the first "symptom" for most women. Other signs would be a change in appetite, maybe some mild nausea, an... Read More
A 32-year-old female asked:
Dr. Derek Haas
Specializes in Fertility Medicine
Yes you can: Yes, you definitely ovulated so it's still possible to get pregnant. When you check a progesterone level it measures just a single point in time. If... Read More
A 36-year-old female asked:
Dr. Derek Haas
Specializes in Fertility Medicine
Normal: Your menstrual cycle pattern can change over the course of your reproductive years. As long as you have full flow bleeding at some point each month t... Read More
A 20-year-old female asked:
Dr. Derek Haas
Specializes in Fertility Medicine
Yes normal: Yes this is normal. Like all combination hormonal contraceptives (progesterone + estrogen), there will be changes to your menses. They have higher pr... Read More
A member asked:
Dr. Derek Haas
Specializes in Fertility Medicine
Protected?: If you started your full flow menses on July 2nd and had intercourse on July 10 then it is possible that you could have conceived. With protected inte... Read More
A 25-year-old female asked:
Dr. Derek Haas
Specializes in Fertility Medicine
Any liquid: It makes no difference the type of liquid you use to swallow your BCP. What's important is that you take it every day and you try to take it around t... Read More
A 18-year-old female asked:
Dr. Derek Haas
Specializes in Fertility Medicine
Very low chance: It is still possible to get pregnant without ejaculation because there are some sperm present in the lubricating fluid ("pre-cum") that precedes male ... Read More
A female asked:
Dr. Derek Haas
Specializes in Fertility Medicine
Yes, possible: Yes still possible to conceive. Not every menstrual cycle is going to be the exact same length. The follicular phase (1st half) of your menstrual cy... Read More
A 23-year-old female asked:
Dr. Derek Haas
Specializes in Fertility Medicine
Not likely: If you were outside then you had good ventilation so you should be fine. In addition, the duration of time (30 minutes) wasn't very long. The baby's... Read More
A 34-year-old female asked:
Dr. Derek Haas
Specializes in Fertility Medicine
Huge range: There is a huge range here for possibilities. Day 7 for a regularly ovulating woman with no other pathology--range 5-9mm. However, if you had someth... Read More
A 25-year-old female asked:
Dr. Derek Haas
Specializes in Fertility Medicine
Possible cyst: If you're trying to conceive, then you should have taken the Clomid (clomiphene) for 5 days. Judging by your symptoms, you may have ovulated from the... Read More
A 39-year-old female asked:
Dr. Derek Haas
Specializes in Fertility Medicine
Need surgery: If you've had that cyst for that amount of time then I think surgery is the best treatment for you. The cyst is both persistent and symptomatic. Lap... Read More
A 38-year-old female asked:
Dr. Derek Haas
Specializes in Fertility Medicine
Yes, protected: Yes, the important pills are the active pills not the placebo pills. The placebo pills are just there to keep you in the habit of taking a pill every... Read More
A 31-year-old female asked:
Dr. Derek Haas
Specializes in Fertility Medicine
Why checking HCG?: It would be helpful if you provided the units on those lab values. Not sure if they're different in Canada vs. US. If you are truly 9 weeks pregnan... Read More
A female asked:
Dr. Derek Haas
Specializes in Fertility Medicine
Yes, normal: Yes, you can have fairly heavy bleeding and cramping for the first 3 days. Symptoms that are concerning would be fevers, chills (signs of infection),... Read More
A member asked:
Dr. Derek Haas
Specializes in Fertility Medicine
Probably not: It's more likely that the brownish discharge is the first sign that your uterine lining is breaking down and you're about to menstruate. After you ov... Read More
A 22-year-old female asked:
Dr. Derek Haas
Specializes in Fertility Medicine
Drop in estrogen: After the LH surge (hormonal trigger for ovulation) there is a natural decrease in the estrogen level. This can slightly destabilize the uterine lini... Read More
A 24-year-old female asked:
Dr. Derek Haas
Specializes in Fertility Medicine
Like a miscarriage: As long as the abortion was performed correctly, the only thing visible on sonogram now should be some leftover blood clots (similar to a recent misca... Read More
A female asked:
Dr. Derek Haas
Specializes in Fertility Medicine
Not much: It could lengthen out your menstrual cycle by a few days but otherwise it should have no significant effect. So instead of a 28 day cycle you might h... Read More
A 16-year-old female asked:
Dr. Derek Haas
Specializes in Fertility Medicine
Probably no and no: A yeast infection can cause inflammation of the urethra and certainly make urination more painful. A UTI can certainly cause you to urinate more freq... Read More
A 42-year-old female asked:
Dr. Derek Haas
Specializes in Fertility Medicine
Many reasons: There are many reasons why you can have an irregular period. You've already ruled out pregnancy. The common thread is usually a failure to ovulate. ... Read More
A 22-year-old female asked:
Dr. Derek Haas
Specializes in Fertility Medicine
Possible PCOS: The ovulation predictor kits don't work for every woman. PCOS patients usually have irregular cycles. Also they can have persistently elevated LH le... Read More
A 26-year-old female asked:
Dr. Derek Haas
Specializes in Fertility Medicine
Normal : Yes, this is typically a sign that your progesterone levels are dropping and that your uterus is preparing to have a full flow period. It is unlikely ... Read More
A 21-year-old female asked:
Dr. Derek Haas
Specializes in Fertility Medicine
Depends on location: Sperm that stay in the vagina will die off rather quickly (within hours) because the vagina is an acidic environment. Sperm that manage to make it pa... Read More
A 24-year-old female asked:
Dr. Derek Haas
Specializes in Fertility Medicine
Not pregnant: A HCG number above 5 is considered positive for pregnancy. 2 is below that so you're not pregnant. You really want the number to be above 25. Just ... Read More
A member asked:
Dr. Derek Haas
Specializes in Fertility Medicine
Irrregular cycles?: Hard to answer because I don't know your menstrual pattern. Do you consistently have 28-30 day cycles? Cycle day 28 is very late to get a peak reading... Read More
A 17-year-old female asked:
Dr. Derek Haas
Specializes in Fertility Medicine
Basically yes: It's very close to being 100% chance of not pregnant. First of all, one week before your menses is not the ideal time to conceive. Two weeks before ... Read More
A 28-year-old female asked:
Dr. Derek Haas
Specializes in Fertility Medicine
Probably not preg: If you take your BCPs every day then there is a very low chance of pregnancy, but it's not a zero % chance. If you're really concerned, then just che... Read More
A 19-year-old male asked:
Dr. Derek Haas
Specializes in Fertility Medicine
Not pregnant: No. The only way to conceive is by penis to vagina penetration. Even if you had true intercourse but did not ejaculate (pre-cum only) there would be... Read More
A 30-year-old female asked:
Dr. Derek Haas
Specializes in Fertility Medicine
Yes: Yes, I would if I were you. You've had 3 miscarriages consecutively now. You need a full work up now to figure out if there is anything correctable.... Read More
A female asked:
Dr. Derek Haas
Specializes in Fertility Medicine
Not enough: You probably did not expose your uterine lining to enough days of progesterone to induce your period. 5 days would be considered a minimum exposure a... Read More
A 29-year-old female asked:
Dr. Derek Haas
Specializes in Fertility Medicine
Hard to tell: The amount of progesterone that your body absorbs from the Mirena (levonorgestrel) is very small. Therefore you could have ovulated around the time t... Read More
A 24-year-old female asked:
Dr. Derek Haas
Specializes in Fertility Medicine
The following day: If you were checking yourself every day and you first detected the surge on CD21 then the following day (CD22) is when the egg is released (or ovulate... Read More
A 23-year-old male asked:
Dr. Derek Haas
Specializes in Fertility Medicine
2-3 weeks: If she has an IUD then you are already protected against pregnancy. IUDs have one of the lowest failure rates for any contraceptive. If you are stil... Read More
A 26-year-old female asked:
Dr. Derek Haas
Specializes in Fertility Medicine
One mature follicle: If a woman is not taking any fertility meds, she will release only one mature follicle per month. This is the case 99% of the time. The 1% exception... Read More
A 49-year-old female asked:
Dr. Derek Haas
Specializes in Fertility Medicine
See your doctor: You are having cramping pains but no bleeding? There are other organs in the pelvis that can cause the sensation of pain/cramps. Specifically, the c... Read More
A 20-year-old female asked:
Dr. Derek Haas
Specializes in Fertility Medicine
Not ovulating: It sounds like you have anovulation or difficulty ovulating. One common form of anovulation is PCOS....polycystic ovary syndrome. There are other co... Read More
A 24-year-old member asked:
Dr. Derek Haas
Specializes in Fertility Medicine
PCOS: Your delayed period has nothing to do with the HSG test. It is caused by the PCOS. With PCOS your body has plenty of eggs but has a difficult time a... Read More
A 36-year-old female asked:
Dr. Derek Haas
Specializes in Fertility Medicine
That can happen: This is usually caused by infrequent (not regular) ovulation. The longer you go between periods, the thicker the uterine lining builds. So when you ... Read More
A 35-year-old female asked:
Dr. Derek Haas
Specializes in Fertility Medicine
Depends: It depends on when the tubal reversal surgery occurred. The first 1-2 months after a gynecological surgery your periods may be off. Your doctor may ... Read More
A 26-year-old female asked:
Dr. Derek Haas
Specializes in Fertility Medicine
Irritation: There can be some irritation of the uterus after an IUI. It depends somewhat on how the semen was processed. Very unlikely to be an infection. You ... Read More
A 26-year-old female asked:
Dr. Derek Haas
Specializes in Fertility Medicine
Not ovulating: Some women naturally have irregular periods. This is usually caused by infrequent (not regular) ovulation. The longer you go between periods, the thic... Read More
A 27-year-old female asked:
Dr. Derek Haas
Specializes in Fertility Medicine
Wait a bit: It sounds like you're about to start your menses due to the cramping pain. How do you know you're not pregnant? You're not sexually active or you've... Read More
A 27-year-old female asked:
Dr. Derek Haas
Specializes in Fertility Medicine
Veggies+fruits: There is no specific diet you should follow. A diet high in vegetables and fruits is a good start. Also, it's important to have sources of good qual... Read More
A 36-year-old female asked:
Dr. Derek Haas
Specializes in Fertility Medicine
Probably: Since your P4 level is above 3 then that indicates that you have ovulated. You would need to measure another value to know if it's going up (a sign o... Read More
A 27-year-old female asked:
Dr. Derek Haas
Specializes in Fertility Medicine
Yes: Yes as long as it is fully cooked. As with all poultry products, there is the risk of salmonella infection if it is not properly cooked. There shoul... Read More
A female asked:
Dr. Derek Haas
Specializes in Fertility Medicine
Okay for now: I'm not worried about your period being lighter/shorter. Your AMH and follicle count are what matter when it comes to your egg reserve. AMH of 1.86 ... Read More

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

2
Recommendations
155
Thank you notes
An excellent fertility specialist. He provides excellent care to my patients. I highly recommend
HealthTap member
Nov 27, 2015
This Thanksgiving, I wanted to share my appreciation for all that you do! Thank you, doctor! :)
HealthTap member
This was very helpful. Thanks! thank you sir. i am 21. i consulted a dermatologist for facial hairs, had laser treatment. in my third procedure recently he adviced me to get ultrasound done for pcos. ...Read More
HealthTap member
This was very helpful. Thanks! Dr. Haas, thank you for your quick response. It's an incredible service you provide, medical guidance to women like me who have questions and are struggling to find ans...Read More
HealthTap member
No prior to clomid my temperature was consistent & never remained below cover line. I do ovulate on my own just not as frequent. Either clomid or prometrium messing up my temps and hormones!

Education & Training

Medical/Graduate school

Indiana University School of Medicine, IN
MD

Residency

University of Tennessee at Memphis
Completed 2001

Awards

Super Doctor, Texas Montly Super Doctors
Top Reproductive Endocrinologist, First Place, National - Spring
2016
Top Doctor, Third Place, Dallas Region - Spring
2016

Affiliations

American Society Of Reproductive Medicine
American Board Of Obstetrics And Gynecology
American College Of Obstetricians And Gynecologists
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