By Dr Nandini Jain, Fertility Specialist at Birla Fertility & IVF, Rewari
She eats well. She exercises. Her reports are mostly “normal”. Yet month after month, pregnancy doesn’t happen. This is a question fertility specialists hear increasingly from women in their late 20s and early 30s – women who, by every visible marker, appear healthy. Fertility, however, is rarely visible on the surface.
When regular periods don’t tell the full story
Many women assume that regular menstrual cycles automatically signal good fertility. In reality, ovulation quality matters as much as ovulation timing. Subtle hormonal imbalances – mild thyroid dysfunction, early insulin resistance, or luteal phase defects – can interfere with implantation even when cycles look textbook. Studies suggest that up to 30–40% of ovulatory infertility cases have no obvious symptoms until investigated closely.
The impact of modern lifestyles
Long working hours, chronic stress, erratic sleep and under-fuelled diets do not always disrupt periods, but they do affect reproductive hormones. Research has shown that elevated cortisol levels can impair ovulatory function and reduce conception rates, even in women with a healthy body mass index.
Ovarian reserve isn’t about age alone
One of the most misunderstood areas is ovarian reserve. Anti-Müllerian hormone (AMH) levels can vary widely among women of the same age. Studies show that nearly 10–15% of women under 35 may already have a lower-than-expected ovarian reserve, often without any visible signs. This doesn’t mean pregnancy is impossible, but it does mean time and treatment planning matter.
Conditions that hide in plain sight
Endometriosis, mild PCOS, or early tubal damage can exist without dramatic pain or irregular cycles. Endometriosis alone affects an estimated 1 in 10 women globally and is found in up to 40% of women with unexplained infertility, according to data from the Lancet.
Why early evaluation changes outcomes
When fertility struggles persist beyond a year, or six months for women over 30, early evaluation is not about ‘jumping to IVF.’ It is about understanding what is happening beneath the surface, before time becomes an added variable. Looking healthy and being reproductively healthy are not always the same thing. Fertility care today is less about labels and more about listening carefully to what the body is quietly signalling.