I have a weird question!

So my MIL brought something up that a lady at church told her. It’s made me curious because it has to do with losses. I have had 6 miscarriages longest carried was 22.5 and all are unknown reasons. But what she (the church lady) said was her daughter miscarried like 7 girls and her one and only full term healthy pregnancy was a boy, (giving my MIL the idea of maybe some people just can’t carry a certain gender!) have y’all ever heard or seen something like this? From the genders I do know on my babies they were boys. Idk I was just curious not like I can purposefully make a girl even if I tried but it had me thinking. Ya know?