The placenta is crucial to the pregnancy - it is the place where your body 'meets' your baby directly to pass across the nutrients your baby needs to grow. Each embryo will eventually become a baby.Īs the balls of cells implant into the wall of the womb (uterus), they meet up with some specialised cells from the mother's womb and, between them, start to form the afterbirth (placenta). Cell division continues until each zygote has become a ball of cells which implants (attaches and embeds) into the lining of the womb and becomes an embryo.
If it splits completely into two separate groups of cells very early in this division then identical twin zygotes are formed. If more than one egg is available to be fertilised then two (or more) separate zygotes may start dividing side by side. It immediately starts dividing, quickly increasing the number of cells. When an egg is fertilised, it becomes a zygote. Monozygotic babies are genetically identical to one another, so they will all be the same sex, will all have identical genes and will usually look very similar as they grow up. Very early in its development this egg splits into two (or more) separate, baby-generating zygotes. Monozygotic siblings come from one single egg. 'Mono' means just one, and 'zygote' means a fertilised egg, so monozygotic means 'one fertilised egg'. Identical twins or triplets are called monozygotic.
Having this sort of twins runs in families (passed down the female side of the family), and is more common if you are a particularly young mother or an older mother. Non-identical twins are the more usual type of twins. They are a genetically different pair of siblings growing in the womb at the same time. The babies have different genes from one another and are not necessarily the same gender. In non-identical twins each egg is fertilised by a separate sperm.
#MIXED CUTE TRIPLETS BABIES SKIN#
"Being a certain color is not an 'accomplishment,' or something to be 'proud of.' No one on this Earth gets to stand in line to pick their skin color. We felt we were given these two beautiful children for a positive purpose - that purpose was to educate those who are ignorant to the fact that these things are possible, and to initiate conversation on race in America," she told TODAY. "We did feel that we were obligated to share our story with others. The children received a lot of media attention as babies, but Cunningham didn't mind. While most people can tell their children are siblings, few pick up on the fact that they are twins. Cunningham is white, and her husband is black.
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