Merp can be used in an catch-phrase to throw people off guard or to have one beg the question Does this person really think he is a grammatitician, I think not! Additionally, one can use the word merp as a euphemism in public as not to offend any people in proximity.
Natural birth to some women means a labour without any medical pain relief, leading to a vaginal birth, and possibly third stage, without any interventions at all. Midwives and obstetricians have their own working definition of natural birth, which sits somewhere in between these different viewpoints.
The father is of right the tutor of his natural children acknowledged by him; the mother is of right the tutrix of her natural child not acknowledged by the father. The natural child, acknowledged by both, has for tutor, first the father; in default of him, the mother.