Pregnancy Calculator Select Method Last Period Date Due Date Ultrasound Date Conception Date IVF Transfer Date Last Period Date Average Cycle Length (days) Due Date Ultrasound Date Pregnancy Length at Ultrasound Conception Date IVF Transfer Date Calculate Gestational Age: Trimester: Estimated Due Date: Baby Size: Estimated Baby Weight: Pregnancy Progress: Enter Your Pregnancy Start Date Weekly Baby Development Milestones Week Date Milestone