Anti-mullerian Hormone Levels in Healthy Females

The purpose of this study is to have a better understanding of the normal blood levels of AMH in females from 0-18 years of age and how the blood AMH levels correspond to a female's reproductive development.

Inclusion Criteria: 1. Pre- and post-pubertal females 2. Ages 0-18 years old 3. Tanner Stage I- V 4. Undergoing routine outpatient surgical procedure 1. Hernia repair (inguinal, umbilical, epigastric) 2. Excision of benign mass 3. laparoscopic cholecystectomy Exclusion Criteria: 1. Previous diagnosis of an illness associated with premature ovarian failure (Turner's syndrome, Fragile X permutation carrier) or endocrine disorder associated with irregular menstrual cycles (Cushing's disease, poorly-controlled Thyroid disease, hyperprolactinemia, polycystic ovary syndrome, and congenital adrenal hyperplasia) or insulin-dependent diabetes mellitus or autoimmune disorders 2. Previous diagnosis of any malignancy or any history of systemic/local chemotherapy, radiation therapy, or stem-cell transplant. 3. Previous surgical excision of one ovary or both ovaries 4. Pregnant females 5. All inpatient surgical patients 6. Undergoing non-routine outpatient surgical procedures 1. Central venous catheter placement 2. Supprelin insertion/removal 3. Breast mass excision 4. Gastrostomy tube insertion