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Follicular Study - Frequently Asked Questions

Follicular Study - Frequently Asked Questions

Follicular study or follicular scan uses ultrasound usually a TVS (transvaginal) scan for studying and monitoring the follicles inside your ovary. It helps in counting the number of follicles, monitoring their growth and...

What is follicular study?

Follicular study or follicular scan uses ultrasound usually a TVS (transvaginal) scan for studying and monitoring the follicles inside your ovary. It helps in counting the number of follicles, monitoring their growth and development, planning infertility treatments and guiding procedures such as IUI (Intrauterine insemination) and IVF (in-vitro fertilization). 

Why do I need follicular scan?

Follicular scan or follicular monitoring ultrasound is indicated in following situations:

  • Infertility
  • PCOS patients who want to conceive.
  • Premature ovarian failure.
  • To evaluate ovulation related abnormalities.
  • To monitor follicular size following ovulation inducing drugs such as clomiphene citrate.  
  • To plan the time of ovulation triggering agents such as hCG injection.
  • To monitor the changes in the endometrium (uterine lining) for successful implantation.
  • To guide procedures such as IUI (Intrauterine insemination), egg retrieval and IVF (Invitro fertilization).
  • To monitor the effectiveness of drugs used for the treatment of infertility.
  • To adjust the doses of fertility drugs and to monitor their side effects such as OHSS (Ovarian hyperstimulation syndrome).

When should follicular monitoring be done?

Follicular study is started from Day 9 or Day 10 of menstrual cycle and is continued till the follicle attains maximum size and ruptures to release the Secondary oocyte (Ovulation).

How many times follicular study is done?

Usually, 5-6 scans may be done in one menstrual cycle. A daily follicular monitoring or monitoring on alternate days may be performed depending upon your gynecologist’s order.

What is a good follicle count for pregnancy?

6-10 antral follicles are usually considered good or adequate for conceiving and getting pregnant.