Answer: Before 10:30am January 10th
Explanation:
When a Rhesus negative mother gives birth to a rhesus positive child, it is expected that she gets a shot of rhesus immune globulin within 72 hours postpartum but when this is known during during pregnancy it is expected that the injection is given around 26-28 weeks gestation however it can be given postpartum not later than 72 hrs after birth.
So for this woman who gave birth at 10:30 am January 7th, assuming she was not given a shot of Rhesus immune globulin at 26-28 weeks gestation, she should be given the shot before 10:30am January 10th