How long does it take to get pregnant?

The chance per cycle

For a couple with no identified fertility problem, the chance of conceiving in any given cycle is roughly 15 to 20%. That is an order of magnitude: it depends in particular on age and on the timing of intercourse around ovulation.

In other words, not conceiving in the first few cycles is the most common situation, not a worrying signal.

The timelines observed

Most couples conceive within the first 6 to 12 months of trying. The cumulative chance rises month after month, then the progression slows down.

Age, the best-documented factor

Age is the most solidly established factor. Female fertility declines gradually, with a faster decline after 35, linked to falling ovarian reserve and egg quality. In men a decline also exists, but it starts later and is more gradual.

When to see a doctor

The markers are the same as in the medical definition: 12 months of unsuccessful attempts, or 6 months from age 35.

The caveat to keep in mind

A longer-than-average wait does not automatically mean infertility. It is a signal worth monitoring and a reason to talk to a health professional — not a diagnosis.