It is a pregnancy in which the very early pregnancy appears normal on an ultrasound scan, but as the pregnancy progresses a visible embryo never develops or develops and is reabsorbed.
An anembryonic gestation (also known as a blighted ovum) is a pregnancy in which the very early pregnancy appears normal on an ultrasound scan, but as the pregnancy progresses a visible embryo never develops or develops and is reabsorbed.  Early pregnancy failure (also known as blighted ovum or anembryonic gestation) is a common cause of miscarriage. It happens when a fertilized egg implants in the uterus but the resulting embryo either stops developing very early or doesn't form at all.  A blighted ovum (also known as “anembryonic pregnancy”) happens when a fertilized egg attaches itself to the uterine wall, but the embryo does not develop. Cells develop to form the pregnancy sac, but not the embryo itself. A blighted ovum occurs within the first trimester, often before a woman knows she is pregnant. A high level of chromosome abnormalities usually causes a woman’s body to naturally miscarry. A blighted ovum happens when a fertilised egg (ovum) implants in the womb (uterus), but a baby doesn't grow. The medical term is anembryonic pregnancy. Sadly, when this happens, it results in an early miscarriage.  A blighted ovum, also called an anembryonic pregnancy or anembryonic gestation, occurs when a gestational sac develops without an embryo — often due to chromosomal abnormalities in the fertilized egg. A blighted ovum usually occurs in the first few weeks of pregnancy, often before a woman even knows she's pregnant. However, a woman might miss a period and have a positive pregnancy test. This is because the placenta secretes human chorionic gonadotropin (HCG), a pregnancy hormone. Blighted ovum. A blighted ovum or anembryonic pregnancy is a type of early miscarriage which occurs when a fertilised egg implants in the uterus but doesn't develop into an embryo. It is also referred to as embryonic demise or embryo loss and is a common cause of early pregnancy failure or miscarriage. A blighted ovum is a common cause of miscarriage in the first trimester of pregnancy. A miscarriage is when a pregnancy ends on its own within the first 23 weeks. When a woman becomes pregnant, the fertilised egg attaches to the uterine wall. At about five to six weeks of pregnancy, an embryo should be present. A blighted ovum occurs when a fertilized egg implants in the uterus but doesn't develop into an embryo. It is also referred to as an anembryonic (no embryo) pregnancy and is a leading cause of early pregnancy failure or miscarriage. A blighted ovum causes about one out of two miscarriages in the first trimester of pregnancy. A miscarriage is when a pregnancy ends on its own within the first 20 weeks. When a woman becomes pregnant, the fertilized egg attaches to the uterine wall. At about five to six weeks of pregnancy, an embryo should be present A blighted ovum, also known as anembryonic pregnancy, occurs when a fertilized egg attaches itself to the uterine wall but does not develop into an embryo. An embryo sac will develop, but the embryo does not.  Blighted ovum is a term used to describe a type of miscarriage. Blighted ovum happens when a fertilized egg embeds in the uterine lining, but the embryo fails to continue to develop. During the early part of the first trimester, the embryo will stop developing, but the egg (gestational) sac will continue to form. The placenta will also continue to form.
https://en.wikipedia.org/wiki/Blighted_ovum http://www.babycenter.com/0_early-pregnancy-failure-blighted-ovum_1355753.bc http://americanpregnancy.org/pregnancy-complications/blighted-ovum/ http://www.babycentre.co.uk/x1014440/what-is-a-blighted-ovum http://www.mayoclinic.org/diseases-conditions/pregnancy-loss-miscarriage/expert-answers/blighted-ovum/faq-20057783 http://www.webmd.boots.com/pregnancy/guide/blighted-ovum http://www.webmd.com/baby/guide/blighted-ovum https://www.fertilityauthority.com/fertility-issues/miscarriage/blighted-ovum http://natural-fertility-info.com/what-is-blighted-ovum-pregnancy-loss.html
what is a blighted ovum