What does lowline placenta means during 13th week of pregnancy.is it safe to take 2hrs flite after icsi?

Likely okay...: A "low-lying" placenta is not uncommon early in pregnancy and, by itself, is not a big concern, especially if you are not having any bleeding. (may be reasonable to avoid sexual intercourse until it moves, ask you healthcare provider.) regarding the procedure you had, and taking a flight, to be safe, i would consult your obstetrician or midwife.