Pregnancy 12-28 weeks information
http://www.birth.com.au/Pregnancy-12-28-weeks.aspx 

http://www.childbirthconnection.com/article.asp?ck=10549  

Baby's Development: 13 to 28 weeks
http://www.birth.com.au/Pregnancy-week-by-week/Your-unborn-babys-development-13-28-weeks.aspx 

Testing During the Second Trimester
http://www.birth.com.au/Pregnancy-visits/Tests-you-may-be-offered-second-trimester.aspx

Sex During Second Trimester
http://www.birth.com.au/Middle-pregnancy-sex-baby-kicking-maternity/Sex-during-middle-pregnancy.aspx 

BubHub Info Sheets for Pregnancy and Birth
http://www.bubhub.com.au/infodirectory.php  

http://www.bellybelly.com.au/articles/pregnancy/

Middle Pregnancy Variations

http://www.birth.com.au/Pregnancy/Pregnancy-12-28-weeks/Possible-pregnancy-variations/Middle-pregnancy-variations.aspx

Preeclampsia
http://birth.com.au/High-blood-pressure/About-pre-eclampsia-high-blood-pressure-during-pregnancy.aspx# 

Gestational Diabetes
http://yourtotalhealth.ivillage.com/gestational-diabetes.html

http://www.birth.com.au/Diabetes-conception-early-pregnancy/About-diabetes-.aspx

Getting your blood sugar down
http://www.newstarget.com/001978.html

Pelvic Pain (Symphysis Pubis Dysfunction)
http://www.plus-size-pregnancy.org/pubicpain.htm#Tips%20for%20Coping%20with%20Pubic%20Symphysis%20Pain  

Braces of various designs for ligamentous and/or symphasis pubis pain during pregnancy.
www.embracingmotherhood.com

www.prenatalcradle.com

Anti D Injections 

http://www.whale.to/a/rhogam.html

http://www.birth.com.au/Blood-groups-and-impact-on-pregnancy/Giving-Anti-D-injections.aspx

http://www.withwoman.co.uk/contents/info/anantid.html

http://www.withwoman.co.uk/contents/info/antid.html

Herbs in Pregnancy

http://www.natural-birth.com.au/flex/pregnancy-health/352/herbs-in-pregnancy.cfm

Acupuncture Treatment During Pregnancy

http://acupuncture.rhizome.net.nz/Pregnancy.aspx