Overview

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.

Eligibility

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