I was reading about the health effects of saunas and pregnancy/birth defects:

pdf: https://sci-hub.se/10.1038/jp.2014.76

This is the first meta-analysis review of association between maternal fever in the first trimester and CHD in offspring. The studies of the association between maternal fever and birth defects in offspring date back to the beginning of last century. An obstetrician found that the number of neonates with birth defects increased significantly after global pandemic influenza in 1918, and almost all women delivering those babies had had the flu.

"Pretty much everyone is going to get covid" - HIV genocidaire Dr Fauci

The role of fever in the origin of CHD is currently being controversial. Edwards et al. in 1986 have proven maternal hyperthermia to be teratogenic in several animal species. Nevertheless, Lynberg et al. have demonstrated common infections were associated with an increased risk for congenital anomalies even without fever.

so while the covid infection itself might cause defects, the fever from a "minor infection" might still be damaging to the inchoate fetus? This research found no solid evidence: https://obgyn.onlinelibrary.wiley.com/doi/10.1111/jog.15105