While cocaine's effects are usually immediate, the effect it can have on a fetus may last a lifetime. Babies born to mothers who smoke crack cocaine during pregnancy -- so-called ''crack babies'' -- usually have their own set of physical and mental problems.hile cocaine's effects are usually immediate, the effect it can have on a fetus may last a lifetime. Babies born to mothers who smoke crack cocaine during pregnancy -- so-called ''crack babies'' -- usually have their own set of physical and mental problems.
Last year, there were 27,000 babies born to momâs over 40. The study was done to help women understand their fertility lifecycle. They still argue that the safest time to have a baby is between 20 and 35. In fact, 30% of 35 year olds need more than a year to conceive while only 5% of 25 year olds need this much time.
The size of your baby is measured and this gives a fairly accurate account of the precise age of your fetus, although the gestational age of the baby becomes more evident later on. The ideal time to calculate gestational age is between the eight and 18th weeks of pregnancy. Women generally, but not always, conceive between the 11th and 21st day after their pregnancy. At least this holds true for women who have a regular cycle.