[Solved] A mother's immune system may have a defensive response to substances produced by male fetuses.This is most likely to contribute to A) erotic plasticity. B) female orgasmic disorder. C) sexually transmitted infections. D) the fraternal birth-order effect. Gear Ratio: The ratio of the rotational speeds of the first and last gears in a transmission, reflecting the difference between the input and output gears. Shock Load: A sudden and extreme force or load applied to a structural component or system, often exceeding the designed stress limits. Mineral-Based: Refers to substances or products derived from minerals, often used in context with lubricants, coolants, or other industrial fluids. Transmission Lubricant: A type of fluid that is specifically designed to lubricate the gears, bearings, and other components within a vehicle's transmission.