Hi. I have feeback for all 4.
1) Not keen on the graphic. Difficult to tell if it's meant to be something or not. Also the font used in "Womens Health Care" doesn't look particularly evenly spaced - kerning and tracking need to be looked at, and the apostrophe is missing. All in all this one isn't working for me.
2) As number 1), but the graphic is a lot better.
3) The colours are good, and very reminiscent of healthcare. The graphic is nice, and the fonts work well. This looks the most professional. The upper case and lower case typography works well.
4) The colours are good, the graphic is good, but I'm not keen on the typography over 3 lines. I don't like the way health care is spread out and WOMEN'S is really large.
All in all no 3 fits the brief best, the graphic in 4 would also work with the typography in 3.
Hope that helps.