Study Population
Inclusion criteria: All female participants between 18-45 years of age who had received two doses of either COVISHIELD or COVAXIN vaccine with or without a booster dose and had previous 3 regular cycles before vaccination were enrolled as study participants. They were enrolled after ≥2 months since their last dose and up to 8 months post-vaccination. The flow chart below depicts enrollment of participants at different centers and the collection of data for analysis and compilation.
Exclusion criteria: All females <18 years or >45 years, those who were unvaccinated or not fully vaccinated, had previously irregular cycles, pregnant, immediate postpartum or post-abortal, lactating, on hormonal or IUCD contraceptives, anticoagulants/antipsychotic drugs, currently suffering from COVID-19 infection, with co-morbidities like diabetes, thyroid disorders, hyperprolactinemia, tuberculosis, autoimmune diseases, morbidly obese, acutely ill patient and those not willing to be a part of the study were excluded.