| soap.org | The Society For Obstetric Anesthesia and Perinatology |
| smfm.org | Society for Maternal-Fetal Medicine |
| perinatal-malaysia.org | Perinatal Society of Malaysia |
| faops.org | Federation of Asia and Oceania Perinatal Societies |
| bapm.org | British Association of Perinatal Medicine |
| aap.org | Perinatal Pediatrics |
| unimelb.edu.au | Perinatal Society of Australia and New Zealand |
| nmanet.org | National Medical Association |
| nih.gov | The National Institute of Child Health and Human Development (NICHD) |
| npic.org | National Perinatal Information Center |
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