Did you want a boy or a girl?
If you want a boy, I believe you wait till later in the fertility cycle, and discharge shallow. If you want a girl, you discharge deep inside, and early in the fertility cycle.
The Egg is easier to penetrate, early in the cycle, and the Female coded sperms are strong, but short swimmers. So they will penetrate the egg, after a short swim.
The Male coded sperm, can swim a along distance, so if you discharge shallow, then only the long swimmers will reach the egg. I am not certain about the egg being softer earlier or later. Ther is a book, if anyone is interested in an accurate description of the research.
There are foods and exercises that help with male fertility.
It does not seem that it would matter whether you materbate or not, but rather how long since you have climaxed, actually discharged semen, regardless of the technique, when you are actually trying to conceive.
I remember discharging deep for my daughter.
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