The first 3 weeks of pregnancy include the 2 weeks after your period begins and fertilization of the egg. The sperm and egg unite to form a single cell called a zygote. The cell divides to form a cluster of cells that travels down the Fallopian tube to the uterus.
Did you know?
Cramping after orgasm is very normal too. These are uterine contractions, which happen after any orgasm, pregnant or not, the difference is you usually only feel them when you are pregnant.