Anovulatory Cycles: Questions on Ovulation and Follicle Development - Obstetrics and Gynecology

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Ovulation-related issues?


Hello Doctor: I have been measuring my basal body temperature for a year and a half, and I have observed fluctuations in temperature.
Last year, I successfully became pregnant, but in February of this year, I discovered abnormalities in the fetus's brain and had to undergo a termination.
I then resumed tracking my basal body temperature and using ovulation test strips.
The temperatures in April, May, and June appeared normal, showing both low and high temperature phases.
However, in July, it was evident that there was only a low temperature phase without a high temperature phase.
Interestingly, on days 23 and 24 of this cycle, the ovulation test strips showed T > C and T = C, but my menstruation started on day 28, with a lighter and darker flow than usual.
I suspect this may be what is referred to as an anovulatory cycle.

In August, on day 10 of my cycle, the doctor performed an ultrasound and found a follicle on the right measuring 1.9 cm and on the left measuring 0.82 cm, with an endometrial thickness of 0.90 cm (without taking any ovulation medication).
By days 13 and 14 of the cycle, the ovulation test strips showed T = C, and today, day 17, my temperature has risen to the high phase.

I would like to ask the following questions: 1.
Is it possible that the follicle from the anovulatory cycle in July did not regress and continued to grow, leading to ovulation in the August cycle? 2.
Assuming the July follicle did regress, is it possible to have follicles in both ovaries in August without taking ovulation medication? (As I understand it, typically several follicles develop in one ovary, and the one that develops the best becomes the dominant follicle for further development.) I appreciate your time in addressing these two questions.
Thank you very much!

Xiao Qin, 30~39 year old female. Ask Date: 2016/08/31

Dr. Cao Guotao reply Obstetrics and Gynecology


Hello, in July, the follicles from an anovulatory menstrual cycle will not be released until the cycle in August.
It is certainly possible that there are follicles present in both ovaries.
Wishing you good health.

Reply Date: 2016/08/31

More Info


Understanding anovulatory cycles and follicle development is crucial for women who are tracking their menstrual cycles and trying to conceive. Based on your detailed observations and questions, let's delve into the two main inquiries you have regarding your menstrual cycle and follicle development.

1. Can the follicle from the anovulatory cycle in July continue to grow and be released in August?
In a typical menstrual cycle, follicles develop in the ovaries, and one dominant follicle usually matures and releases an egg during ovulation. However, in an anovulatory cycle, which seems to be what you experienced in July, the body may not release an egg despite the presence of a follicle. If a follicle does not ovulate, it typically undergoes a process called atresia, where it degenerates and is reabsorbed by the body. Therefore, it is unlikely that the follicle from July would continue to grow and be released in August. Each cycle generally starts with a new set of follicles, and the hormonal signals that trigger ovulation are reset with each menstrual cycle.
However, there are instances where multiple follicles can develop in a cycle, and sometimes, if the hormonal environment is conducive, a woman may experience a late ovulation. But in your case, given that you observed a clear anovulatory pattern in July, it is more plausible that the follicles did not persist into the next cycle.

2. Is it possible to have follicles in both ovaries without the use of ovulation-inducing medications?
Yes, it is entirely possible for both ovaries to have developing follicles in a natural cycle, even without the use of ovulation medications. While it is common for one ovary to dominate the cycle and release a mature egg, both ovaries can produce follicles simultaneously. This phenomenon is known as bilateral follicular development.
In a typical menstrual cycle, several follicles begin to mature, but usually, one becomes the dominant follicle that will ovulate. However, the presence of multiple follicles in both ovaries can occur, especially in women with regular cycles. Factors such as hormonal balance, age, and individual ovarian response can influence this process.
In your case, the ultrasound findings showing follicles in both ovaries suggest that your body is capable of producing multiple follicles, which is a normal physiological response. This could lead to the possibility of ovulating from either ovary in a given cycle, depending on which follicle becomes dominant.

Additional Considerations:
Tracking basal body temperature (BBT) and using ovulation predictor kits (OPKs) are excellent methods for understanding your cycle. The BBT typically rises after ovulation due to increased progesterone levels, while OPKs detect the surge in luteinizing hormone (LH) that precedes ovulation. If you notice a pattern of anovulatory cycles, it may be beneficial to consult with a healthcare provider or a fertility specialist. They can perform further evaluations, such as hormone level testing or more detailed ultrasounds, to assess your ovarian function and overall reproductive health.

In conclusion, while it is unlikely that a follicle from an anovulatory cycle would continue to grow into the next cycle, it is certainly possible for both ovaries to have developing follicles in a single cycle. Understanding these dynamics can help you better navigate your reproductive health and family planning efforts. If you have further questions or concerns, please feel free to reach out to your healthcare provider for personalized advice and support.

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