Natural fertility declines steeply after the mid-30's.
Women continue to be at risk of spontaneous pregnancies until much later.
How to identify when contraception is no longer required around menopause?
The risks in becoming pregnant at an advanced reproductive age are higher in terms of complications, such as hemorrhage, venous thromboembolism, and death, and fetal complications, like spontaneous abortion, stillbirth, and congenital anomalies. Hence, it is important to be really sure when to stop contraceptives to avoid unplanned pregnancies.
The exact age at which a woman can no longer become naturally pregnant is not known and differs from woman to woman until menopause is reached. The age of menopause also varies with the median age being approximately 51 years, though it can range from ages 40 to 60 years.
What is menopause?
Menopause is the natural cessation, or stopping, of a woman's menstrual cycle and periods, and marks the end of fertility. The clinical diagnosis of menopause is made retrospectively after 1 year of amenorrhoea, which is the absence of menstruation.
Though most women do not require measurement of their serum hormone levels to make the diagnosis, the post-menopause condition is characterized by low levels of serum estradiol and raised levels of FSH (follicle-stimulating hormone) and LH (luteinizing hormone). As a general guide, a serum FSH level >30 IU/L indicates a degree of ovarian insufficiency, but not necessarily sterility.
Menopause is preceded by a phase known as perimenopause, which is a time of fluctuating hormone levels. The average duration of perimenopause is around 4 years but this can again vary greatly. During perimenopause, the menstrual pattern is erratic due to variable ovarian function.
When is it safe to stop contraception?
While there is no one definitive age and medical test to identify when contraception should be stopped, it is safe to recommend using some method of contraception till menopause is reached to avoid any unwanted pregnancies or health complications. It also comes down ultimately to a woman’s decision to stop contraception when fertility is low as it is a personal and individual decision. While menopause can be assumed in the majority of women at 55 years of age, caution is needed for women with a family history of late menopause or an absence of menopausal symptoms. Women in advanced reproductive age should consult with doctors for the right advice on contraception methods and when to stop contraception and then make an informed choice.
Special thanks to Dr. Ritu Joshi (MS Gyn & OBSTET) for the expert advice.