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Doctor insights on: Size Of Follicle Before Ovulation

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Follicle (Definition)

An ovarian follicle contains a hollow ball of cells with an immature egg in the center. It is a structure within the ovary containing the egg that ...Read more


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Do follicles always ovulate at the same size? If so, what size?

Do follicles always ovulate at the same size? If so, what size?

No: An ovary is about an inch to inch and a half and contains the various follicles in various stages and sizes
hopefully an obgyn will add on! ...Read more

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Is follicle size 13.5 on day 13 normal.?! will I ovulate this time

Is follicle size 13.5 on day 13 normal.?! will I ovulate this time

Small: The follicle usually reaches 18 to 20 mm when it is ready to ovulate. In the days preceding ovulation, follicles usually grow approximately 1 mm per day. Based on your number, I would guess you will be ovulating in 5 to 6 days, but this is just a guess, and it may be that you won't ovulate at all this cycle. Unfortunately it's hard to tell in advance what will happen. Would luck! ...Read more

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What is ideal size for follicle to ovulate? Is 18 mm considered mature?

Natural cycle?: 18 mm in a natural cycle (no drugs) is mature; in a Clomiphene cycle would be more like 22-23 mm. ...Read more

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Is there any chances of ovulation naturally f follicles are in size of 1.1-0.9?

Is there any chances of ovulation naturally f follicles are in size of 1.1-0.9?

Not yet: 9-11mm is probably too small to ovulate. Typically they are around 20mm when ovulation occurs. ...Read more

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What should be the size of follicles for ovulation? I ve 16 and 15 on day 15 of cycle.

What should be the size of follicles for ovulation? I ve 16 and 15 on day 15 of cycle.

Ovulation: Generally speaking of follicle is able to rupture and emit the eighth at approximately 18 mm or greater. Nature is funny and full of variability and some sure there are follicles that rupture at an even smaller size and sometimes we see follicles as big as 30 mm that then ovulate spontaneously. I hope this helps. ...Read more

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Do follicles cause ovulation? If no, what does? If yes, does the follicle size matter?

Follicles: Contain the developing eggs which can be "ovulated" when certain hormonal sequences occur. But it's your body releasing a surge of luteinizing hormone that stimulates ovulation. ...Read more

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What is follicle size to ovulate induced by gonadotrophin injection?

HCG trigger: IN a natural cycle between 16-18 mm, in a Clomiphene cycle between 20-24 mm, in a hMG/FSH cycle between 16-20 mm - these are typical, not hard fast rules. ...Read more

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Does dupahastone 10 mg prevent ovulation if I take it twice a day when the follicle size is 15 mm and 16 mm?

Possibly: It is possible that it may prevent ovulation and/or prevent implantation of a pregnancy. I would be very cautious about relying on it to prevent pregnancy though. ...Read more

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Is it true that some women, small % of women ovulate with 15-16mm follicles? If so, are eggs good size to be fertilized? My dr said this is possible.

Disbelief?: Do you think the doctor would lie to you? An egg is microscopic. So is the sperm. They cannot be seen with the naked eye. The ovarian follicle size is meaningless. ...Read more

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My follicle size 11.9mm on cd 17th....Any possibility for ovulation. As I iiregular mensus?

Small follicle: 11.9 mm is too small for a pre-ovulatory follicle, so you are not close to ovulation. If the follicle continues growing to around 16 mm (in a natural cycle) it may well ovulate; I've seen this up to about day 25. Good luck. ...Read more

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Hi Dr., Following are my ovulation study results: Day 12 & 14 : 12 mm follicle in Left ovary Day 16 : 14 mm follicle in Left ovary Day 18: 12 mm follicle in Left ovary Can this be possible? Why would the follicle size decrease?

Hi Dr., Following are my ovulation study results: Day 12 & 14 : 12 mm follicle in Left ovary Day 16 : 14 mm follicle in Left ovary Day 18: 12 mm follicle in Left ovary Can this be possible? Why would the follicle size decrease?

Discuss with doctor: It is important to know if you are currently being treated for ovulation problems. Follicular monitoring can be done to assess one’s response to treatment. It is unclear from these isolated measurements if ovulation occurred. ...Read more

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Now on 2nd round of 100mg clomid (clomiphene). On cd11, follicle size is 12x9mm, 10x8mm. Ovulated on first cycle of 100mg clomid (clomiphene).Is it possible for ovulation?

Now on 2nd round of 100mg clomid (clomiphene). On cd11, follicle size is 12x9mm, 10x8mm. Ovulated on first cycle of 100mg clomid (clomiphene).Is it possible for ovulation?

Not yet: Those follicles are way too small for ovulation, but d11 is early for most women. They may very well become large enough in the next week or so. What day did you ovulate in your first Clomid (clomiphene) cycle? Good luck! ...Read more

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16 mm follicle size on CD10 doctor said I'd ovulate on CD13 or14 but I had ovulation pain on CD18. I have 31days cycles. Can my LP be 18days long?

Yes: The most fixed part of the cycle is the leuteal phase which is usually 14 days unless you have leuteal phase problems. The follicular phase is more variable. With 31 day cycles you would expect ovulation on day 17 or so. ...Read more

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My follicle size on day 16 was 12x11mm. I normally ovulate late. Wht is the possibility that I ovulated bet day21-24.doc discontinued monitorin on day16?

Count back: To try to estimate when you ovulated, if you count back 14 days from your period, that was when you ovulated. It won't help you in trying to time sex that month, but may help with future months. ...Read more

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D11 has follicles size 15mm, D13 follicular scan shows regressed. Does this mean in a natural treatment, ovulation occurred when follicle reached 18mm?

It could be.: You need to check for the LH surge. If you are doing an IVF cycle you will adminster an HCG shot which will mimic LH and cause ovulation, . If you are on antagon therapy this will stop the natural LH surge for the most part but it is not entirely failsafe. Some of the follicles may undergo atresia but you may have other viable follicles that can take over so all hope is not lost. ...Read more

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On a medicated cycle (250mg of Clomid (clomiphene))i had two follicles 11mm and 12mm are these good size for cd10 and is it poosible to ovulate both eggs?

On a medicated cycle (250mg of Clomid (clomiphene))i had two follicles 11mm and 12mm are these good size for cd10 and is it poosible to ovulate both eggs?

Yes: Sounds like 2 good maturing eggs on cycle day 10. You may ovulate from both if they are similar. We expect 2mm increase in size per day and ovulation to occur at about 20mm. ...Read more

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I have taken Clomid (clomiphene) 100mg for 5 days. Then on my 11th day follicle has been reached a size 14mm. When I got ovulated & when should I take home test?

I have taken Clomid (clomiphene) 100mg for 5 days. Then on my 11th day follicle has been reached a size 14mm. When I got ovulated & when should I take home test?

Ovulation: Ovulation occurs about 14 days before your next period. If you started Clomid (clomiphene) on day 3 then that would trigger ovulation midcycle. Usually your doctor would schedule a Progesterone around day 21 to make sure Clomid (clomiphene) worked to make you ovulate. Check a pregnancy test if you miss your period. ...Read more

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My follicle size on 3rd scan is 16mm on day 16. Will I ovulate? I had siphene 100mg. And im having pcos. Please reply me

Maybe: That follicle has to grow to 19-20 mm prior to releasing it's egg. That could happen over the next few days, or not. Only time and the next ultrasound will tell. If it doesn't happen at all, then your doctor may change your dose. Good luck! ...Read more

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Clomid (3-7).Ultrasound on cd11 and follicles size 15, 16. Dr. Advised to ve intercourse 11-17 daily. Does it mean I will ovulate this week? Confused.

Clomid (3-7).Ultrasound on cd11 and follicles size 15, 16. Dr. Advised to ve intercourse 11-17 daily. Does it mean I will ovulate this week? Confused.

Most likely: Yes the assumption is you will ovulate when the follicle gets a little bigger. There are various ways to use and monitor someone with clomid (clomiphene). There are certainly more things you can do or check if you want. ...Read more

Dr. Philip Chenette
1,830 Doctors shared insights

Ovulation (Definition)

Ovulation is the act of the ovary releasing the egg after it has been hormonally prepared, to be ...Read more