H.R. Giger's original creature design continues to frighten audiences decades after it debuted in "Alien," but does the ...

During pregnancy, maternal and fetal cells migrate back and forth across the placenta, with fetal cells entering the mother's bloodstream and tissues ...

Objectives Adolescent Sexual and Reproductive Health encompasses their physical and emotional well-being, including their ability to avoid unwanted pregnancies, unsafe abortions, sexually transmitted ...