Not a "mom blog," but covers pregnancy and childbirth from a scientific viewpoint plus some parenting topics - The Skeptical OB - https://www.skepticalob.com/ the author was a practicing obstetrician, professor at Harvard Medical School, and mom of 4.
Not a "mom blog," but covers pregnancy and childbirth from a scientific viewpoint plus some parenting topics - The Skeptical OB - https://www.skepticalob.com/ the author was a practicing obstetrician, professor at Harvard Medical School, and mom of 4.