What is the size of a mature follicle in mm that makes pregnancy more likely?
Feb 06, 2023
Source: Cainiu Health
Dr. Lv Aiming
Introduction
A normal mature follicle has a diameter between 18-22 mm. Women are more likely to conceive after ovulation, but if the follicle is too large or too small, it may affect fertility. Women can appropriately engage in intercourse when the mature follicle reaches 18-22 mm in size. It should be noted that ovulation typically occurs within 10 hours after the follicle matures, and the period within 24-48 hours after ovulation is considered optimal for increasing the chances of conception.
A mature follicle measuring around 18–22 mm in size is most conducive to conception and can improve pregnancy rates to some extent.
Mature follicles are structural components of the ovary. As follicles develop, they accumulate more fluid and increase in size, gradually protruding to the surface of the ovary. A mature follicle has a large antral cavity, a clearly visible cumulus oophorus, and its nucleus appears vacuolated with sparse chromatin and a prominent nucleolus. The follicular membrane is distinctly divided into inner and outer layers. Normally, a mature follicle has a diameter between 18 and 22 mm. Women are more likely to conceive after ovulation occurs; however, if the follicle is too large or too small, it may negatively affect fertility. Couples may appropriately time intercourse when the mature follicle reaches 18–22 mm in size. It should be noted that ovulation typically occurs within 10 hours after follicular maturity, and the 24 to 48 hours following ovulation represent the optimal window for achieving pregnancy.
Women should maintain healthy lifestyle habits and visit a hospital approximately 7 to 10 days after intercourse to confirm pregnancy via blood HCG testing.
