Fortunately I've never had it, but my wife is going through some bad morning sickness as she's in her 5th week of pregnancy, have you ever had it?
I am morning sickness free, although I have had morning sickness literally before, it was liquid on both ends!
Ouch, sounds rough. It can linger too, about 10% of women I've heard still have it even after 20 weeks.
What stage of fertilization coincides with week 5?
I believe it's the beginning of the fetal development phase, as the embryo is referred to as a fetus by the end of week 10.