Hi, we're really not trying to be critical, just looking out for the health and well being of the beardies. As far as the male goes, at 10 months he's only just started puberty and his sexual organs are not fully developed. He may be showing signs like head bobbing,
black bearding, etc but he is still very young, doesn't understand what it is all about and could damage his male parts when not fully mature. A 10 mo old would be about equal to a 12 to 13 yr old human and we all know that they are not mature by any means. Not to mention the fact that your female is a lot bigger than him so she could actually harm him.
At 19 months, your female isn't full grown, they continue to grow until the age of about 2 yrs, sometimes even later. Eggs deplete all the vitamins and nutrients that the female has in her body so if she isn't old enough, heavy enough or healthy enough, she very well might not survive and the babies may not either. When a human female becomes pregnant, the fetus takes what it needs so that's why frequent dr visits are necessary and the mother is also placed on prenatal vitamins because it's crucial that the mother is as healthy as possible. If not, deformities to the fetus could develop and also put the mother at risk. So, you're actually looking at the same risks with beardies. They certainly rely on us for their well being so we need to consider all the risks and also make sure we are doing the best for them. Hope that answers some of your questions.