At this stage there is not yet any conception (when sperm meets egg) much less a fetus!
Maternal Changes on Week 2
Through your period, the uterus lining has been shed and a new uterus lining is being formed in order to support a growing fetus. The ovaries are just about to release an egg or more than one if you are having maternal twins, triplets, or more.
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.