Conception and fertilization
This Week you definitely ovulated, so the zygote starts its remarkable journey to a baby boy or girl! Within days it will divide into two cells, then four and so on, until the cluster will comprise around 100 cells. Some of the cells form the embryo, others the placenta. As it divides, the blastocyst starts traveling to your uterus a journey where it will implant itself in the uterine wall and grow for the next nine months. Your baby's appearance, sex and other characteristics are determined at fertilization.