Uterus		It connects the developing fetus to the mother through the placenta from the sixth week of pregnancy until birth. This cord supplies the developing fetus with oxygen, nutrition, and a means of waste elimination while in the womb.
Identical twins		The product of the fusion of an egg and a sperm. It contains two copies of each chromosome, one from each parent.
Ovaries		the female reproductive organs where an egg is fertilized. The fallopian tubes carry the fertilized egg to the uterus.
Fetus		sperm meets egg in fallopian tupe and fuses into an ovum,which eventually leads to the development of an embryo.
Embryo		a white or grey liquid, emitted from the urethra (tube in the penis) on ejaculation.
Fallopian tubes		an egg-producing reproductive organ found in female organism.
Umbilical Cord		the stage for the 1st trimester for babies.
Sperm		Begins about eight weeks after fertilization, when the major structures and organ systems have formed.
Amniotic fluid		The baby used to the sound of the mom's heart beating, the baby is in tummy rumbling, the pulsing of blood vessels.
Placenta		They usually look alike and occur when a single egg is fertilized to form one zygote.It forms when a single fertilized egg (ovum) splits in two.
Conception		The water in which a baby stays in the placenta.
Quickening		The egg in th ovary of the female. This the female "gamete" or sex cell. It combines with the male gamete (sperm)
Zygote		They do not share any more similarities . Two eggs that are fertilized by two separate sperm and are no more alike than other siblings born to the same parents. They may not be the same sex. This type of twins is much more common, and only this type is affected by heredity, maternal age, race, and number of prior pregnancies.
Fraternal twins		an temporaty organ present in female for baby to stay in.
Ovum		Your body and your baby are working together to get ready for labor and delivery. You may breathe more easily after your baby "drops," meaning after she settles into a head-down position, with her arms and legs pulled tightly against her chest.
Lightening		also known as the womb is the major female reproductive organ of most mammals, including humans.