HCG monthly for one year. HCG once every three months for one year. Pregnancy is permissable after one year of normal titres. If pregnancy is suspected an ultrasound is indicated for early confirmation. HCG once a month for two years.
Pregnancy is permissable after two years of normal titres.
Once again, if pregnancy is suspected an ultrasound is indicated. HCG once every three months for the third year. HCG titres once every six months for the fourth year.