Should I do it all?

I want to write a post in reaction to a post I saw in a FaceBook group. Taking steps before a pregnancy to prevent XYZ. I have 3 boys. The amount of people that have said to me that there are things I can do to raise the chances of having a girl. And my answer is always "if I have another child, I will not take steps to make sure they are a girl. I will do it normal and pray for healthy. The sex doesn't matter." Out of my 3 boys, 2 are on the spectrum. The youngest is not. My father is not diagnosed, but he is definitely on the spectrum. It is very clearly in my family and very clearly genetic. With my oldest I had GD that went undiagnosed until 40 weeks, so I ate plenty of sugar and this is a known environtmental push for someone with the "right" genes. This son is now 12 (almost 13) and he is amazing. He is extremely smart, responsible, and caring (some of the time...) and I wouldn't want him to be any different than he is. For my younger two kids I did not have GD and the older of the two of them is ASD. I made the decision almost a year ago that I might want another one, so I should start losing weight because the GD by me seems to be weight-related. I lost 10 kilos over 6 months. And then I stopped losing weight. Over Rosh Hashana I made the decision that I want another one. I definitley want another one. At the same time, it is still important for me to do things natural. And I will be happy with an ASD child, just like I am happy with the two boys I already have on the spectrum. And then comes in the question. Should I? Do I want to? Should I go to a geneticist? Should I go to all the Dr's in the world and take all the vitamins, lose all the weight, be perfectly healthy before I even try. And then what? If I put in way more effort than I did for my other kids and then this next one is on the spectrum as well. Will I be even more disappointed? That is my fear. If I take it like the other ones, it is what it is. But if I try really hard, then I am leading myself to disappointment. On the other hand, if I don't do everything I can, will I later be sorry and think how irresponsible it was. I will probably go now and make tons of appointments and take tons of blood tests and take tons of vitamins and who knows what else. But is it the right thing to do? I do not know. For now I am back to losing weight. And loving the wonderful kids I have. And crying, I always love crying.