Pregnancy weeks and months correspondence chart Pregnancy is one of the most important periods in a woman\’s life. Pregnant women need to know their gestational age at all times, manage their pregnancy correctly, and ensure the health of themselves and their babies. The following is a correspondence table of weeks and months of pregnancy: 1. 1-4 weeks of pregnancy: This period is from the first to the fourth week after conception. Women may not know that they are pregnant. At this time, the embryo begins to grow and develop. Pregnant women need to pay attention to maintaining good eating and rest habits, and avoiding smoking, drinking,