<unk>  <unk>  is the<unk>  of the embryo to implant onto the side of the uterus wall following IVF treatment. Regularly, this happens at 6–7 days after conception and involves the embedding of the growing embryo into the mothers uterus and a connection being formed. A successful<unk>  can be determined by using an ultrasound to view the sac which the baby grows in, inside the uterus. However, the exact definition of<unk>  is debated. Recently the most commonly accepted definition is when a woman under 40 has gone through 3 unsuccessful cycles of IVF, when in each cycle 4 good quality eggs have been transferred.<unk>  should not be confused with recurrent IVF<unk> . Recurrent IVF<unk>  is a much more broad term and includes all<unk><unk> s to get pregnant from IVF.<unk>  specifically refers to those<unk> s due to unsuccessful implanting to the uterus wall. An unsuccessful<unk>  can be down to either problems with the mother or with the embryo. It is essential that the mother and embryo are able to communicate with each other during all stages of pregnancy, and an absence of this communication can lead to an unsuccessful<unk>  and a further unsuccessful pregnancy.
Repeated implantation failure
High-risk pregnancy
Male lactation
Male pregnancy
Abortion in Europe
Teenage pregnancy
Pregnancy
Pre-existing disease in pregnancy