hi i recently went through my first ivf cycle had 1 embryo implanted of 12 cells an the best quality i had collected on thur 17 th found out i was 2 wks pregnant then sat 19 th started to have a light bleed which got heavier over night and developed into a period i went the hospital this morning 20th feb and had an examination an they informed me i had a biochemical pregnancy what are the chances of this happening again and is there any medication i can take to prevent this can some one please give me some advice thanks