Everyone knows that women need to be pregnant for ten months before they can give birth, but many people don't actually know that ten months of pregnancy is 280 days, which is 40 weeks. In medicine, one month is generally considered as four weeks, so when it comes to four months of pregnancy, it is actually different from our normal calculation method. So how many weeks is four months pregnant?
Medically, 4 weeks are considered as one month, which means that from week 16 to week 19, the average duration of pregnancy is 280 days, or 40 weeks. This is what we call 10 months of pregnancy. Usually, whether calculating the time of pregnancy or estimating the due date, it is calculated from the first day of the last menstrual period. The due date is calculated by adding 280 days (40 weeks). However, since most people cannot determine the date of fertilization, the former calculation method is more convenient. However, these 280 days include the days before pregnancy, which is normal. In fact, the pregnancy time or estimated due date calculated by this method is only for the convenience of various examinations during pregnancy, and there is no need to determine the accurate date of fertilization and pregnancy.
In the fourth month of pregnancy, the growth momentum of the fetus is rapid! The body length may increase rapidly from 10cm to 16cm. The weight of the fetus is about 110g, and the eyes that were originally biased towards both sides have started to focus forward, making them look even more beautiful! The bones of the fetus have almost become rubber like cartilage and are gradually hardening.
This article provides a detailed introduction to the duration of pregnancy at four months, indicating that it starts at 16 weeks and ends at 19 weeks. That is to say, four months of pregnancy is not our usual number of weeks. At four months of pregnancy, the baby develops very rapidly and has already weighed 110 grams.
