PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 18219564-2 2008 Prolactin is the major driver of development during pregnancy via regulation of ovarian progesterone production (in many species) and direct effects on mammary epithelial cells (in all species). Progesterone 88-100 prolactin Mus musculus 0-9