Ten Months of Gestation: How Might Classical Texts Inform Contemporary Protocol?

When is the earliest day that implantation into the uterine wall can occur?

When does the placenta take over the production of the hormone Progesterone?

What is the Ishimpo?

When are formulas to "make the fetus slippery" (hua tai yao 滑胎藥, "fetus-lubricating medicines") prescribed?