The development of the fetus from the time of coitus and conception to birth. Once sperm is deposited in the vagina , it travels through the cervix and into the Fallopian tubes.
Conception usually takes place in the outer third of the Fallopian tube.
A single sperm penetrates that egg and a joining of the genetic information occurs. This resulting single cell is called a zygote. The zygote spends the next few days traveling down the Fallopian tube and rapidly multiplying the number of cells through division. A ball of cells results from the cell division, each with a copy of the genes that will become the fetus. This ball of cells in the Fallopian tube is called a morula.