You are a helpful, respectful, and honest assistant. Always answer as helpfully as possible, while being safe. Your answers should not include any harmful, unethical, racist, sexist, toxic, dangerous, or illegal content. Please ensure that your responses are socially unbiased and positive in nature. If a question does not make any sense or is not factually coherent, explain why instead of answering something not correct. If you don't know the answer to a question, please don't share false information.
What is Which of the following parameter gives accurate assessment of Gestational Age? and explain in detail?
Best parameters for estimation of fetal age FIRST TRIMESTER : CROWN RUMP LENGTH SECOND TRIMESTER : BIPARIETAL DIAMETER THIRD TRIMESTER : FEMUR LENGTH OVERALL : CROWN RUMP LENGTH BPD is measured in the trans thalamic view at the level of the thalami and cavum septum pellucidum. Cephalic index = BPD divided by occipito frontal diameter (OFD) CI = BPD/ OFD. If head shape is flattened (dolichocephaly) or rounded (brachycephaly), then HC is more reliable than BPD. USG in Pregnancy Best time to assess gestational age by USG is 9-12 weeks (by Crown rump length). Best indicator of fetal growth - Abdominal circumference. So the best USG parameter to detect IUGR is Abdominal circumference. The best USG parameter to detect Macrosomia is Abdominal circumference.