I'll leave these here for everyone to peruse at their leisure (if you can). I dunno if I'd recommend basing anything on abstracts, I like to to look at study design (exposure measurement, control selection etc.), and they don't usually contain anything about study limitations. I'd hate to encourage misinformation. Usually university libraries have print copies of these journals. Going there to look these up is a better, if more investing, option.
Induced abortion as an independent risk factor for breast cancer: a comprehensive review and meta-analysis, J Epidemiology and Community Health, J Brind et al., 1996, 50:481-496
To meta-analyse or not to meta-analyse: abortion, birth and mental health. Br J Psychiatry. Kendall T, Bird V, Cantwell R, Taylor C. 2012 Jan;200(1):12-4. (A bit high-level, but gives a good explanation of what to watch out for when looking at studies on abortion, and in my opinion and excellent point on the individuality of treatment)
I can't find the other ones right now, but I will message you (and anyone else who wants them) with them when I do. Pubmed always seems to hide articles when I want to find them.