Yeah & many women (me ) have trouble gaining bc of nausea & other hormonal effects. Others are too tired to eat. This is completely my non-medical opinion, but I think women who pack on the pounds, especially in the first few months, are ones who found out early & said "fuck it" & are using pregnancy as an excuse to eat everything.  But you know, who cares about setting up an innocent child for a life of poor health from an unhealthy incubator when Preggo can gobble like a snort pig.