Phemoral pores are not an accurate way to sex dragons. I'll include a link bellow so you can see a pic. for sexing.
The most acceptable age would be 18 months. I prefer 2yrs. There are many other factors to go by in addition, weight, overall size, health, etc. If you have a 2yr old who is skinny or under 400g. then it wouldn't be advisable to breed her.
This is a very controversial subject. Breeding young dragons is comparable to a 13yr old girl having a baby. Yes it can & does happen, but is it safe or a good idea?
You definitely want to make sure you have unrelated dragons to breed. There is a post not to far down asking why their babies tails are messed up, yet they openly admit they parents are related. It doesn't take a Dr. degree to use common sense.
There is another post not far down talking about the costs involved with raising babies. It's not cheep! If you are looking to make some money, forget about it. I guarantee that you will loose money for the first year or two. The only way you will make any decent money is if you are VERY lucky & something spectacular pops out (not likely to happen).
When you have a clutch or two of babies you can't even go away for the weekend, unless you have someone you can trust to come over & take care of them (several times a day). It is a lot of work, time, & money to get a clutch to 6weeks so you can sell them.
Now, if you do get them to 6 weeks, there is a lot of competition out there. Go look at the classifieds & see how fast an add gets buried. Check in the morning & then go back that night & see how many are posted after the first one you looked at. That's a lot of competition! Like I mentioned above, unless you have some top notch animals, you may wind up finding it hard to give them away. (no joke)
Sooo,, go through this board & read all the posts you can. Go to as many sites as you can & read as many care sheets as you can. Definitely do your homework before you jump in.
Good luck.
Dachiu's sexing page
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Joel R
Coming some day.
www.SpikesAndScales.com