About 12 percent of women have trouble getting or staying pregnant. Of course, you won’t know for sure until you start trying to conceive, but these clues are a good indication that your body is baby-ready.

You know when your period’s coming.
Women who get their periods every 24 to 35 days are probably ovulating normally. A regular cycle is one of the clearest signs that your hormones are working properly and releasing an egg each month.

You can track when you’re ovulating.
Aside from cycle length and predictability, being able to detect your body’s subtle clues that ovulation is actually occurring each cycle is a good sign. (Plus, knowing the exact window of time when you ovulate is the best way to time your babymaking sex to boost your pregnancy odds.) Most women ovulate 14 days before their next period. (In a 28-day cycle, that means day 14. In a 32-day cycle, that means day 18.) But unless your cycle’s totally regular from month to month, it’s hard to know for sure.

You’ve never had an unchecked STD.
Certain bacterial infections, like chlamydia and gonorrhea, can spread to organs throughout the reproductive tract, causing pelvic inflammatory disease (PID). This infection can cause serious damage to your ovaries, fallopian tubes, and other organs, significantly increasing your risk of infertility.

You’re at a healthy weight.
Weighing too much or too little can make you more likely to have fertility problems (although heavy and thin women do get pregnant all the time). In overweight and obese women, excess body fat can disrupt the delicate balance of hormones needed for ovulation and helping a new embryo develop and thrive into a healthy pregnancy. On the flip side, women with too little body fat may have difficulty getting pregnant because their bodies are conserving energy to keep the rest of the body functioning properly; this can shut down ovulation.

You don’t smoke cigarettes.
We don’t need to tell you that a cigarette habit is bad for your health, but you should know that smoking can damage your eggs and derail ovulation, increasing the time it takes you to get pregnant and the risk of miscarriage if you do. Those odds go up even more if your partner smokes too.