A complication that occurs in early pregnancy is hydatidiform mole. This molar pregnancy or hydatidiform mole can be partial or complete.
Complete hydatidiform mole (MHC) is caused by fertilization of an egg without genetic material with a sperm. In this case, a duplication of the sperm DNA is necessary and a diploid mass is generated, consisting only of 46 paternal chromosomes.
This type of mole is characterized by not generating an embryo, but the pregnancy test may show a positive result due to the production of beta-hCG hormone by the placenta.