Pregnancyhappens when a sperm fertilizes an egg released from the ovary during ovulation. After that, the fertilized egg descends into the uterus, where implantation occurs. Effective implantation leads to conception. There are three trimesters in pregnancy. A little more than 13 weeks are spent in each trimester. The first trimester https://pickasblog.com/14-symptoms-in-early-pregnancy/