Why do men experience the side effects of hormones only women make during pregnancy? The answer could change the way we look at men as partners in birth. — Up to 80% of men report sensations similar to their partners during pregnancy, including morning sickness, irritability, bloating, and weight gain. Yet, it is impossible for men to produce some of the hormones that cause them. Are they sympathetic, is it psychological, or is there something else happening here? If…