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Explanation and Clinical Context The Bishop score is a clinical tool used to assess cervical favorability for labour induction by assigning points to five parameters assessed on digital cervical examination: cervical dilation, effacement, fetal station, cervical consistency, and cervical position. Each parameter contributes a subscore. The total score ranges from zero to thirteen. Higher scores indicate a cervix that
Fetal middle cerebral artery Doppler as an anemia predictor Measurement of fetal middle cerebral artery peak systolic velocity is a non invasive method to assess the risk of fetal anemia. The measured PSV is expressed as a multiple of the median for the same gestational age. A multiple of the median at or above 1.5 has been widely used as a threshold to indicate increased probability of moderate to severe fetal anemi
Date of Egg Retrieval or Fertilization Embryo Transfer Type Select Type Fresh transfer Day three embryo Fresh transfer Day five embryo Frozen transfer Day three embryo Frozen transfer Day five embryo IVF Based Estimated Date of Delivery Explanation and Clinical Context Estimated Date of Delivery in pregnancies achieved through in vitro fertilization follows a more accurate methodology because the exact timing of fert
Pearl Contraceptive Index Explanation and Clinical Context The Pearl Index is a commonly used measure of contraceptive effectiveness expressed as the number of unintended pregnancies occurring per 100 woman years of exposure. It is calculated by dividing the total number of pregnancies by the total woman years of exposure and then multiplying by 100. When exposure is reported in months the equivalent formula is pregn
Pain during menstruation Pain during intercourse Pain during pelvic examination Pain during urination Pain during bowel movement Chronic pelvic pain at rest Explanation and Clinical Context The Pelvic Pain Index is a structured scoring method used to quantify the severity of pelvic pain across several clinical situations including menstruation intercourse pelvic examination urination bowel movement and pain at rest.
Last Menstrual Period LMP Pregnancy Week Counter Explanation and Clinical Context Pregnancy Week Counter is a practical clinical tool used to estimate gestational age based on the first day of the Last Menstrual Period. This approach follows the Naegele principle in which pregnancy age is counted from the first day of the LMP and is widely applied in obstetric care. Accurate calculation of gestational age helps clini
Explanation and Clinical Context This calculator estimates the volume of fetal whole blood and the number of 300 microgram vials of Rh immune globulin required after a positive Kleihauer Betke test or after counting fetal and total red blood cells on a stained smear. The calculation uses the conventional relation where the volume of fetal whole blood in milliliters equals the fetal cell percent multiplied by 50. Each
Explanation and Clinical Context This calculator provides an estimated probability of successful vaginal birth after cesarean by applying a logistic regression model developed from a large obstetric cohort. The score integrates maternal age body mass index history of prior vaginal delivery indication for previous cesarean and other clinical predictors that influence the likelihood of successful trial of labor. A hist