A molar pregnancy is more likely in people older than age 43 or younger than age 15.Īfter removing a molar pregnancy, molar tissue might remain and continue to grow.

A repeat molar pregnancy happens, on average, in 1 out of every 100 people.

If you've had one molar pregnancy, you're more likely to have another. Risk factorsįactors that can contribute to a molar pregnancy include: This most often occurs when two sperm fertilize an egg, resulting in an extra copy of the father's genes. The embryo then has 69 chromosomes instead of 46. In a partial or incomplete molar pregnancy, the mother's chromosomes are present, but the father supplies two sets of chromosomes. The chromosomes from the mother's egg are missing or don't work. In a complete molar pregnancy, one or two sperm fertilize an egg. In a typical fertilization, one chromosome in each pair comes from the father, the other from the mother.

Human cells usually have 23 pairs of chromosomes. An egg fertilized atypically causes a molar pregnancy.

State of survival - plasma core