Multiple Births

Sometimes a woman may have a multiple birth. (i.e. give birth to twins, triplets and so on). There are two kinds of multiple births: identical and non-idetical. Identical twins develop froma single fertilised egg which has divided nto two egg cells. Each cell develops into an independent embryo resulting in dentical individuals-- either both ale or both female. Non-identical births occur when more than one egg cel is fertilised at the same time by separate sperms, each or all cells developing into individual embryos which may be all of one sex or of both sexs.