Researchers at King's College London looked at the immune system of 30 babies born to mothers exposed to SARS-CoV-2 at different stages of pregnancy.
Scientists studying the skin condition believe it could be the human immune system's response to the virus which causes COVID-19 and usually develops within one to four weeks of being infected.
The doctors attributed a 15-20 per cent surge in the number of hair loss cases during the second wave.
Vaccines are designed to activate your immune system, and some experts have wondered if that could temporarily disrupt menstrual cycles. So far, reports of irregular bleeding have been anecdotal.