Blighted Ovum A blighted ovum occurs when a fertilized egg implants in the uterus but doesn't develop into an embryo. ... A blighted ovum causes about one out of two miscarriages in the first trimester of pregnancy. ... When a woman becomes pregnant, the fertilized egg attaches to the uterine wall. ...
kupicoo / Getty Images Despite the name, a chemical pregnancy is not a false pregnancy or a false positive on a pregnancy test. In fact, it's a very early miscarriage. Doctors believe chemical pregnancies are usually caused by chromosomal abnormalities.
Ectopic pregnancy: An ectopic pregnancy happens when a fertilized egg implants itself outside of the uterus. An ectopic pregnancy can occur in the ovary, abdomen, cervix or fallopian tube, but more than 95% of the time it occurs in the tube. That’s why an ectopic pregnancy is often considered the same thing as a “tubal pregnancy”.
A molar pregnancy, also called a hydatidiform mole, is one where an abnormal fertilised egg implants in the uterus (womb). The cells that should become the placenta grow far too quickly and take over the space where the embryo would normally develop. The term ‘hydatidiform mole’ means a fluid-filled mass of cells.
Cervical insuffiency can cause premature birth and miscarriage. Premature birth is when your baby is born too early, before 37 weeks of pregnancy. Miscarriage is when a baby dies in the womb before 20 weeks of pregnancy. If your provider thinks you may have cervical insufficiency, she may check you regularly during pregnancy with transvaginal ultrasound starting at 16 to 20 weeks of pregnancy.
A number of factors can lead to a second-trimester miscarriage. If your miscarriage was diagnosed early in the second trimester, it might have actually occurred in the first trimester. If your miscarriage was diagnosed early in the second trimester, it might have actually occurred in the first trimester.