In the past few years, we have covered plenty of amazing calculators for WordPress. Pregnancy Calculator is also worth a look, specially if you run a website focused for maternity and women’s health. This plugin provides users with a pregnancy schedule based on provided dates. It also recommends date ranges to get a NT and morphology scan.
This calculator also provides reports with estimated due date, probable conception date, fetal age, and other dates to give moms-to-be peace of mind. Pregnancy Calculator features lightweight code. You can find out more about it here.