A colleague asked: Why am I not pregnant yet? Sir: Thank you for the invitation. Pregnancy is like farming. The fields are fertile, but if the seeds planted are shriveled and bad, they will definitely not germinate. No matter how good the soil is, it will be useless. If the seeds are good, there are no nutrients in the ground, just like saline-alkali soil, and no matter how good the seeds are, they will not be able to germinate. If the ground has enough nutrients and the seeds are healthy and plump, then…