Some places say the 2nd trimester begins at 13weeks others say 14. I'm going to go with when my nausea ends. Of course if I get to 28weeks and I'm still really ill it might be time to move ahead and claim 3rd trimester status anyway. We shall see. We plan on throwing Baby Party x2 the end of January, should be cold and awesome.Babe sings. Ohhhhh she can sing songs you know, songs you don't. The next door lawn care professionals enjoy her concerts to no end.