I'd just try the baby and see. My baby is 2 months old and although he's really big (over 15 pounds) he's just not built right. Maybe not long enough? I don't know. But if I put him in regular his legs don't really spread that way (he has short fat legs,lol).<br><br>
If you put baby in and he/she seems comfy and is supported I'd go for it. I wouldn't do it if the head is bobbly and isn't supported though.