hi i would say she hs a hormone inbalance.. but she needs to go to docs as you have been trying for a baby for a while they will do some blood tests and you will have to go for a semen test too then i shoul say you will be reffered to fertility specialist.... that is what has happened to me.......also she could try and change her diet as that plays havok with periods .... tell her to cut down on bread and crisps anything with wheat or yeast drink plenty water and exercise and try and eat high fibe diet..... i was irregular and this has helped me loads