Having risks after 40 is a myth. You can have more children after 40 with no problems. I know quite a number of women who have given birth in their 40's -- even 50's! A prime example is that one of my friends had five children, and at 46, gave birth to her sixth child (a daughter) 16 years after the fifth child. 17 years later, my friend, who is in her mid-60's, is quite robust and healthy, and so is her teenage daughter. A lot of those celebrities have no clue (or, maybe they do, but don't care) that their "doctors" are after their money. Think about it, in centuries past, women always have given birth through to older ages with no problems. Medical doctors try to pretend they are God, and scare their patients into feeling they are at risk in order to get them to pay higher for something which had not been a concern to our grandmothers, great-grandmothers, and their mothers before them. God did not tell people to stop having children and to control the population -- He said, "Be fruitful and multiply." There are many women, like the example I gave above, who have large, happy families, and many of them even homeschool their children. Being that you have had a success rate already with three children, nothing should stop you from having more children. They are the jewels in your crown. My best wishes to you.