3 weeks lag in the fetal growth with no fetal heartb eat in 9 weeks of gestation. This is a case of blighted ovum or missed abortion where the foetus dies but the placenta still continues to release the hormones and expressing the signs of pregnancy. Around 1% of all pregnancies result in missed abortions. Coming to the causes; chromosomal abnormalities due to poor sperm or egg. In blighted ovum the egg develops gestational sac, placenta, membranes but not embryo. This missed abortion also can be seen in people with PCOS, anti phospholipid antibody syndrome, certain bacterial infections like toxoplasmosis, bacterial vaginosis also ups the risk. Sexually transmitted diseases like aids, syphilis, gonorrhoea, chlamydiasis, malaria and measles infection also pose a risk for this problem.
