age 37, 5ft tall, weight 10 stones, relatively healthy, did ivf due to male factor infertility and it failed, i have a son who is 15 to a previous relationship and he was a natural conception and birth by c section as he was 9lbs when he was born, i expected my ivf to work. the only reason in my opinion it did not work was maybe i use nasal decongestants called sudafed. do decongestants halt embryo implantation