Timothy Allen recently updated his freewareOB Suite, which, in addition to a standard OB wheel, also calculates dates from ultrasound data. The program also lets you calculate when a patient will reach a certain gestational age, tracks OB patients, tracks inpatients, tracks procedures, and calculates Bishop scores. With the latest update, OB Suite now includes an IVF Wheel, which calculates gestational age based on beta-HCG injection and IVF with day 3 or 5 transfer.