Pregnancy and Fertility

Estimate how many weeks pregnant you are, your due date, trimester, key pregnancy dates and a week-by-week fetal size reference from LMP, conception, IVF or ultrasound dating.

Estimate a pregnancy due date from last menstrual period, conception date, IVF transfer or ultrasound dating, with term windows and reverse planning.

Estimate a likely conception date and fertile window from a birth date, due date, last menstrual period or confirmed ovulation date.

Estimate your pregnancy weight-gain range from pre-pregnancy BMI, current week, current weight and singleton or twin pregnancy using CDC/IOM-style guidance.

Estimate your likely ovulation date, fertile window and next period from the first day of your last period, cycle length, period length and luteal phase.

Estimate your next period, cycle day, cycle regularity and upcoming period dates from one or more recent period start dates.

Estimate a child's adult height from parent heights and check a height-for-age reference position with pediatric growth-chart caveats.

Estimate possible baby blood types from parents' ABO and Rh blood types using educational inheritance probabilities and Punnett-square style logic.

Estimate a child's adult height from current age and height, with an optional mid-parental height cross-check and pediatric growth cautions.