It is considered as the most dramatic prenatal phase as lots of changes occur in this stage and it is also the most hazardous of the three prenatal stages because most miscarriages occur at this time
In the first two months, the baby is called an "embryo". But from that period on to the birth, the baby is called a "fetus."
18-22 days 18-22 days
The prenatal period is anytime from the time of conception until the baby is born.
Ther is no such thing as period of embryo .
No, taking prenatal vitamins won't impact on your period. Prenatal pills are typically vitamins, which could see you have a better period all together, but won't be a major change.
the longest stage is the fetal stage.
No prenatal vitamins do not cause you to miss your period - they are vitamins, thus have no influence on your menstrual cycle. Consider that if prenatal vitamins did cause you to miss your period (which would only happen if you missed ovulation) then they would prevent pregnancy, this work against those who were taking them!