The so-called gravida is the name given to a woman who, after pregnancy without normal fetal development, has hyperplasia of the placental chorionic trophoblast cells and a high degree of interstitial edema, forming blisters of varying sizes, which are connected in bunches and shaped like grapes. In normal humans, all chromosomes are diploid, half from the father and half from the mother, and the karyotype of complete gravida is also diploid, all from the father, lacking maternal chromosomes; while more than 90% of partial gravida is triploid, with extra chromosomes also from the father; normal males consist of 22 pairs of autosomes + one pair of sex chromosomes XY, and sperm before fertilization contains 22+X or 22+Y; females The normal male consists of 22 pairs of autosomes + sex chromosomes XX, and the pre-fertilization meiosis is two eggs, each containing 22+X; the normal sperm-egg union forms 22 pairs of autosomes + sex chromosomes XX, which is a female baby, or 22 pairs of autosomes + sex chromosomes XY, which is a male baby. Staphylocytosis occurs when there is an abnormality in the formation of sperm and egg, resulting in a disruption of the chromosomal gene combination during the sperm-egg union process, which fails to form a normal embryo and develop into a normal fetus. This is an unpredictable and unpreventable event. The male partner cannot be blamed!