Do Alterations in Placental 11β-Hydroxysteroid Dehydrogenase (11βHSD) Activities Explain Differences in Fetal Hypothalamic-Pituitary-Adrenal (HPA) Function Following Periconceptional Undernutrition or Twinning in Sheep?Kristin L. Connor, Frank H. Bloomfield, Pierre van Zijl et al.|Reproductive Sciences|2009Cited by 25