Intended pregnancy is great news to any woman, but what about those unplanned ones? It’s relatively easy to tell whether a woman is pregnant three or four months after conception, but early pregnancy signs aren’t so obvious. Pregnancy tests are fairly reliable these days, but they aren’t right 100% of the time. Women who don’t think about pregnancy often don’t even buy a pregnancy test, so they find out only when the baby’s development becomes noticeable. To avoid this surprise, women and their partners should know the ten most frequent early pregnancy signs.

1. Late Period

Most people know a late period signifies a possible pregnancy. However, various environmental, mental and physical factors can contribute to a late period. Consider pregnancy only when the period is three weeks late. On rare occasions, it’s possible to completely skip a period for one month without being pregnant.