The fetus is now weighing in at half a pound and is looking like an actual human instead of an alien. It is about five inches long from head to end of butt. Your baby can now hear because the bones in the inner ear have hardened. Sounds will startle it and it may kick and punch.
Maternal Changes on Week 18
Your uterus is just below the belly button now. Your total weight gain from the pregnancy should be about 10 to 13 pounds.
Pregnancy most commonly lasts 40 weeks, this website provides information of a general nature and is not a replacement for professional healthcare advise. There are many factors that can influence a pregnancy due date including age, ethnicity, number of previous children, and length of menstrual cycle. Every woman's pregnancy is different and the due date can only be estimated within a certain degree of accuracy.