International HG research and information
The BUMPS (Best Use of Medicine in Pregnancy) website is a searchable resource run by the UK Teratology Information Service. It gives a quick summary of the risks and benefits of medications in pregnancy.
The Hyperemesis Education and Research (HER) Foundation is the main charity in the United States which provides support and information internationally. They are the main funders of research into HG in the US and have volunteers around the globe. Their website hosts dozens of research papers and support information for patients and providers.
Spewing Mummy is a UK blog by the Chairperson of PSS, Caitlin Dean. It has a wealth of information in a straight talking and often witty style. Caitlin has written two books on hyperemesis. Hyperemesis Gravidarum - The Definitive Guide is for sufferers and healthcare staff. The second, How to be an HG Hero, is a book for children whose mothers are sick to help them understand and empower them.