Psychological Pregnancy
One in six pregnancies are estimated to be psychological. The last and most significant recent case occurred in the U.S. On opening the uterus and can not find the baby after he tried to induce labor at the hospital found no fetus.
This is an extreme case but not the first time it happens, is a rare psychological disorder but relatively common, common in many mammals (in dogs is very common) and not only in humans. It is estimated that about 22,000 pregnancies are psychological.
Pregnancy is also known as imaginary or utopian, but its official name is pseudocyesis. It happens when the woman has some or all of the symptoms of pregnancy, including even the growth of the uterus or milk production, without actually being pregnant.
Usually occurs as a result of a great desire to have a child. It is sometimes associated with depressive states or the inability to conceive or carry a pregnancy to term. And although it is extremely rare, can also occur in males. In the case of men usually happens when a woman has a real pregnancy, this is a psychological pregnancy solidarity.
The desire to end a pregnancy (psychological factor) has put in place to hormones (neuroendocrine factor): luteinizing hormone and follicle reduce their activity by inhibiting ovulation and menstruation, while prolactin and progesterone are activated, as in pregnancy.
Although you can display all the signs of a pregnancy, there is even the subjective perception of fetal movements, is easy to dismiss that there is just a fetus with ultrasound. Curiously, also the fact that the navel is not clear suggests a psychological pregnancy.