Most moms carrying twins go into labor at 36 to 37 weeks, as opposed to 40 in a single pregnancy, Al-Khan says, and some may go even earlier. Generally, if the twins are born after 34 weeks, there should not be a major concern, but a premature baby is still a premature baby, he says.
False pregnancy in humans is less common, and may sometimes be purely psychological. It is generally believed that false pregnancy is caused by changes in the endocrine system of the body, leading to the secretion of hormones that cause physical changes similar to those during pregnancy.
Expired tests or tests that are difficult to read can all contribute to having a false positive pregnancy test, whether it be a test of the urine or a blood test. Both âpositiveâ tests just mean there is HCG floating around but doesnât mean you are actually pregnant with a fetus.