Write the next sentence in this paragraph:

How to increase prolactin
Stimulate your breasts towards the end of your pregnancy.
Starting about 2 months before the baby is due, start to pump your breasts with an electric pump. This can stimulate prolactin production.

Pick your answer from: a. This can prevent the baby from hatching or accidentally attempting to use the pump during the pregnancy. You should be fertile on average three months later.; b. You may need to increase the pump for 12-24 hours until this happens for the most effective results. It might be helpful to take a multivitamin to track your period and timing.; c. Your baby will start to use up prolactin naturally. It will need 2-3 hours of continuous exercise every day for the first 4 months.; d. Start by pumping for 5 minutes, three times daily. Gradually increase this to pumping for 10 minutes every four hours, and then to 15-20 minutes every 2-3 hours.;
d.