Final answer:
Elective C-section is typically offered for estimated fetal weights of >=4500 grams in non-diabetic women and >=4000 grams in diabetic women to reduce the risk of complications.
Step-by-step explanation:
Elective cesarean section (C-section) is often considered when the estimated fetal weight (EFW) is significantly larger than the average, as it can increase the risk of complications during vaginal delivery. According to current medical guidelines, elective cesarean delivery may be offered for suspected fetal macrosomia, which is usually defined when the estimated fetal weight is at or above 4500 grams in pregnant women without diabetes and at or above 4000 grams in pregnant women with diabetes due to the increased risks associated with delivering larger babies.