Over-taxing a mother with exhausting labor during pregnancy causes feebleness and disease.

Original passage

The strength of the mother should be tenderly cherished. Instead of spending her precious strength in exhausting labor, her care and burdens should be lessened. Often the husband and father is unacquainted with the physical laws which the well-being of his family requires him to understand. Absorbed in the struggle for a livelihood, or bent on acquiring wealth and pressed with cares and perplexities, he allows to rest upon the wife and mother burdens that overtax her strength at the most critical period and cause feebleness and disease.