[Residual ovarian function after minidoses of estroprogestative agents]

Area of Science:

• Reproductive endocrinology
• Pharmacology

Background:

• Combined oral contraceptives (COCs) are widely used for গর্ভনিরोध.
• Understanding the impact of varying ethinyl-estradiol and levonorgestrel doses on ovarian function is crucial for optimizing contraceptive efficacy and safety.

Purpose of the Study:

• To evaluate the residual ovarian secretions under low-dose (30 mcg ethinyl-estradiol/150 mcg levonorgestrel) oral contraceptive pills.
• To compare the effects of minidose COCs with higher-dose formulations on the hypophysio-ovarian axis.

Main Methods:

• Plasma levels of 17 beta-estradiol, FSH, and LH were measured on days 7, 14, 21, and 28 of the menstrual cycle.
• Three studies were conducted: a preliminary study (>1 year use), a comparative study (3 cycles vs. control), and a crossover study (minidose vs. 50 mcg ethinyl-estradiol).

Main Results:

• Low-dose ethinyl-estradiol and levonorgestrel pills demonstrated a significant braking effect on the hypophysio-ovarian axis.
• This suppressive effect was comparable to that observed with higher-dose estrogen/progestogen preparations.

Conclusions:

• Minidose oral contraceptives containing 30 mcg ethinyl-estradiol and 150 mcg levonorgestrel are effective in suppressing ovarian activity.
• These low-dose formulations provide similar hormonal suppression to higher-dose COCs, suggesting comparable contraceptive efficacy.