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A successful pregnancy goes through many distinct stages. A man's sperm should reach, penetrate, and fertilize a woman's egg. The resulting cell must divide and form a blastocyst. The blastocyst much reach the uterus and implant in the mucous membrane. The established blastocyst continues its development into an embryo then a fetus.
At any point during this process issues can occur that interfere with a successful pregnancy.
Blastocyst Implantation
When the blastocyst reaches the uterus it implants within the mucous membrane, the mucus membrane that lines the uterus. The external cells of the blastocyst and therefore the female internal reproductive organ inner lining, together, can produce the future placenta. The placenta is a structure that transfers nutrients to the baby and removes his/her wastes6.
Problems with Implantation
When a fertilized egg is able to implant within the womb however fails to develop it will be described as an empty gestational sac or """"blighted ovum"""". It typically occurs due to the presence of abnormalities in the chromosomes of the sperm, the egg cell or the fertilized egg or cellular division. This event could happen within the early days of pregnancy7.
Sometimes, a fertilized egg won't implant within the womb. there's scientific proof that the endometrium is to blame for the selection of the embryo before facilitating the implantation. This mechanism eventually leads to implantation of healthy embryos or rejection of abnormal embryos. Some human embryos have alterations in their genes referred to as mutations that may delay or impede normal development. These impairments make them inappropriate for natural implantation and can increase the probability for miscarriage8.
