A research study aims to evaluate a new experimental type of fetoscopic laser surgery to correct a potentially life$-$threatening condition for the fetus prior to delivery. This research is to meet the health needs and directly benefit the fetus only. The pregnant woman is otherwise healthy. Per Subpart B$,$ the investigator must obtain consent from whom?

The pregnant woman only.

The pregnant woman and the father of the fetus $($except if he is unable to consent because of unavailability, incompetence, or temporary incapacity or the pregnancy resulted from rape or incest$).$

The state court where the research is taking place

The father of the fetus only.