Yoga has been proven to help with infertility.  In an article in Yoga Journal they reference the following study:

Other recent evidence echoes the positive effects of yoga for infertile

women. In 2000, Harvard Medical School researcher Alice Domar, Ph.D.,

published the results of a study in Fertility and Sterility

(Vol. 73, No. 4) that showed women who participated in her program,

which included relaxation and yoga, were almost three times more likely

to get pregnant than women who didn’t.

Yoga helps with stress, and stress is not a good thing when you are trying to get pregnant because it stimulates your adrenals and thus raises your cortisol levels which in turn disrupt your body’s ability to produce sex hormones.

So, the poses you want to utilize when trying to get pregnant are all the restorative poses like corpse pose, and then a lot of hip openers (like pigeon, frog, happy baby) and those poses that move energy in the pelvis.

Poses to try are:

Bridge Pose	1.  Supported Bridge Pose (Setu Bandha Sarvangasana) like the picture to the left, but put a block or a bolster under your pelvis. Salamba Sirsasana (Supported Headstand), Salamba Sarvangasana (Supported Shoulderstand)
supported shoulderstand	2.  supported shoulder-stand. this pose is especially good for hormonal balance.
supported headstand
leg up the wall pose	4.  Legs up the wall pose (like the picture to the left) you can also butterfly your legs as you keep them on the wall to get a pelvic stretch.
bound angle pose	3.  Bound Angle Pose or Baddha Konasana  (see image to the left) you can also do reclining Bound Angle, which would be more restorative.  From here you would lie back and leave your legs as they are except for possibly supporting each one of them with bolsters.

i would recommend checking out the full article at Yoga Journal.

also, check out this website, yoga for fertility for a free sample video.   the teacher makes a uterus symbol with her hand that I found really mindful and feminine.