When the number of antral follicles is intermediate, the response is not as predictable. In most cases the response is intermediate. However, we could also have either a low or a good response when the antral counts are intermediate. Pregnancy rates are pretty good overall in this group.
From our own observations and experience, here are some general guidelines: Total number of antral follicles. Share on facebook. Share on twitter. Share on linkedin. Table of Contents. Advanced Fertility Center of Chicago. Fertility BLOG.
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Total number of antral follicles. Unlike men, who produce sperm on an ongoing basis, females are born with a lifetime supply of eggs in their ovaries.
When a girl reaches puberty, her eggs are released on a monthly basis; by the time a woman reaches menopause, her egg supply and potential fertility is exhausted. An antral resting follicle is a small, fluid-filled sac that contains an immature egg. In other words, a higher number means a greater ovarian reserve.
A higher number also indicates that you would likely respond well to ovarian stimulating drugs that would be used in basic fertility procedures, such as intrauterine insemination IUI and more advanced options like in vitro fertilization IVF , in which the goal is to produce multiple eggs for a better chance of pregnancy. Although antral follicle count is a valuable indicator of fertility, a low number does not necessarily mean you will be unable to have a baby.
To establish the best treatment plan for you , our Las Vegas fertility doctors will examine many factors as part of your complete fertility workup.
To start your comprehensive fertility evaluation, contact us to schedule a consultation. Antral follicle count measures ovarian reserve Women are born with their lifetime supply of eggs already inside their ovaries. What your antral follicle count means Antral follicles are tiny structures — just 2 mm to 10 mm wide — that can be viewed by ultrasound very early in your menstrual cycle.
It's this hormone that triggers the follicles to mature. As the follicles increase in size, they release more estrogen. Higher levels of estrogen signal the pituitary gland to slow down the production of FSH. Even though you started with five or six follicles, just one and sometimes two will make it to maturity.
Lower levels of FSH cause the smaller follicles to grow more slowly or even stop growing, while the bigger follicle continues its steady development. Eventually, one follicle becomes the dominant follicle; the others stop growing and disintegrate.
When the follicle reaches close to its maximum size, it releases even more estrogen. Very high levels of estrogen trigger the pituitary gland to produce and release LH, or luteinizing hormone. This pushes the follicle to complete its last stages of development. Finally, the follicle will burst open and release an egg. This is the moment of ovulation.
You might think that follicular development starts and ends during the follicular phase of the menstrual cycle, but that is not the case. The full follicular lifecycle begins before a person is even born, when the ovaries are first developed in a growing fetus. At this time, the ovaries contain only primordial follicles. It takes anywhere from six months to one year to go from a primordial follicle to a mature, ovulation-ready follicle. At every stage of follicular development, many follicles stop development and die.
Not every primordial follicle will go through each stage. Think of it as a competition to get to the Olympics of ovulation. Some follicles will drop out, and others will continue. The stages of folliculogenesis are:. During these ultrasounds, the number of developing follicles will be counted. They will also be measured. Follicles are measured in millimeters mm. This is around 18 mm. A mature follicle that is about to ovulate will measure anywhere between 18 and 25 mm. The desirable number of follicles is different for various fertility treatments.
You need more follicles for in vitro fertilization IVF , for example. Ideally, you only want one or two good size follicles during a Clomid cycle. You may feel disappointed when you find out only one or two follicles are big enough to ovulate. Every mature sized follicle could release an egg, and that egg could become fertilized.
If you have two follicles, you could conceive twins. Or you might conceive one baby. Or, you might not conceive at all. As with Clomid, ideally, you only want one or two follicles to grow to maturity.
Injectable fertility drugs gonadotropins come with a higher risk of a multiple pregnancy. If you get four or more follicles, your doctor may cancel your treatment cycle.
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