The phenomenon of "secret" pregnancy is not unknown to doctors. A woman may be waiting sweetly and not knowing until a certain moment. This may happen for one of the following reasons:
# 1. Periods are always messy
According to the same doctor, if your periods are always irregular you will probably not notice the pregnancy. The disorders can occur due to body chemistry or Polycystic Ovary Syndrome.
# 2. Pregnancy tests are not always accurate
Although the chances for the tests to go wrong are small, this is possible. Your body may not have produced enough hormones to detect them at the time the test is done. This is especially the case when you drink a lot of water. Do the test more than once.
# 3. Weight gain
Women who are overweight do not necessarily recognize physical changes as the baby grows inside them. Excessive layers may cause them to not feel the baby's movements in the abdomen.
# 4. Baby growth is very smooth
It is normal for a child to start moving especially in the third trimester, but not all children do. Sometimes even the placenta prevents the mother from feeling his movements.
# 5. Chronic stomach problems
If you've always had stomach problems such as nausea, vomiting, flatulence, you probably won't notice it when you're pregnant.
Source: Women's Health