With my 1st I had very little MS-girl. #2 and #3 horrid MS-both girls too.
My sister's 1st was a girl and she had no MS. With her 2nd she had a ton of MS and he's a boy. My friend's 1st was a girl she had MS bad, 2nd a girl MS not quite as bad, 3rd a boy and bad MS. Other friend has 2 boys and she had really bad MS with both. My SIL has a boy and she had pretty much no MS. My other sister has 1 girl and had bad MS with her. It seems pretty even But it might be slightly true? but its not that great of an indicator of gender