A Mazahs enhanced human is one of the few classifications of being that would be able to successfully do sex with a female possessing a biology comparable to a Kryptonian.
But... A baseline regular foetus, if the sperm could even penetrate the superegg, would be smothered inside Superwoman unless every sperm shot inside her was also Mazahs enhanced... Yet, if the Shazam family's powers are divided every time Billy shares them, spread out between the rest of the Marvel family, then perhaps the Luthor family's powers from a negative universe where everything is sorta opposite, are multiplied, not divided, every time Alexander spreads his superpowers. No, not times 2 because of the foetus. Times 60 million because of the sperms.
60 million times almost as strong as Superman is very strong.