Name Info Provider Link
Fetal Health and Development free resource MedlinePlus Health Information https://medlineplus.gov/fetalhealthanddevelopment.html
free resource PubMed Central https://www.ncbi.nlm.nih.gov/pmc/articles/pmid/18853037/
free resource Scientific Electronic Library Online https://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-31802008000400011&lng=en&nrm=iso&tlng=en