Newborn Genitalia
Conditions
Keywords
Newborn genitalia, reference charts
Brief summary
Normal values for female external genitalia size at birth, particularly clitoris and blood level of androgens are not well known. This study's aim is to collect normal values in 180 newborn girls of 24 to 41 weeks of pregnancy, and to build genitalia growth charts according to gestational age and birth weight. The investigators will measure clitoris, genito-anal ratio using a small plastic caliper, at birth, and their evolution until Day 3 of life (if the child is still at the hospital). The investigators also want to establish normal values of blood testosterone, 17-hydroxyprogesterone, delta4-androstenedione, 21-deoxycortisol, 11-deoxycortisol, deoxycorticosterone, corticosterone, dehydroepiandrostenedione, and dihydrotestosterone), using samples taken for systematic post natal screening of diseases (only in new born of 35 or more weeks of birth). This is an observational prospective study.
Interventions
OTHERExternal genitalia measurements in female newborns
Sponsors
Hospices Civils de Lyon
Study design
Observational model
COHORT
Time perspective
PROSPECTIVE
Eligibility
Sex/Gender
FEMALE
Age
No minimum to 3 Days
Healthy volunteers
Yes
Inclusion criteria
* Healthy female newborns 24 to 41 weeks of pregnancy without sexual development disturbances. Dysmature children - i.e. those with a - 2DS birth weight or height at are not excluded.
Exclusion criteria
* Sexual development abnormality, diagnosed pre- or post- birth, endocrine disorder, obstetric trauma affecting genitalia, malformation syndrome, midline abnormalities, congenital cancer, maternal ovary or adrenal tumor diagnosed during pregnancy, mother or father's treatment during pregnancy likely to virilize the fetus, family history of congenital adrenal hyperplasia or neurofibromatosis
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| length of the clitoris | Day 1 | The measurement is performed on the supine child, with flexed hips and knees retained by the nurse or the nursery nurse. The clitoris will be delimited using cavernosa palpation. The clitoris length will be measured from maxima lablias'root to the top of clitoris, excluding cutaneous cover. Measurements are performed using an-8 cm plastic caliper. |
Secondary
| Measure | Time frame | Description |
|---|---|---|
| anogenital ratio | Day 1 | The ano-genital ratio is the ratio between 1) the distance from anus center to the base of clitoris and 2) the distance from anus center and the posterior commissure of the vulva frenulum. |
| Blood level of testosterone | Day 3 | This dosage will be performed using a 1.5 ml blood sample taken for screening purpose (for routine systematic post natal screening) only in newborn over 35 WA |
| Blood level of 17-hydroxyprogesterone | Day 3 | This dosage will be performed using a 1.5 ml blood sample taken for screening purpose (for routine systematic post natal screening) only in newborn over 35 WA |
| clitoris width | Day 1 | The clitoris will be measured at its base, using an-8 cm plastic caliper. |
| Blood level of 21-deoxycortisol | Day 3 | This dosage will be performed using a 1.5 ml blood sample taken for screening purpose (for routine systematic post natal screening) only in newborn over 35 WA |
| Blood level of corticosterone | Day 3 | This dosage will be performed using a 1.5 ml blood sample taken for screening purpose (for routine systematic post natal screening) only in newborn over 35 WA |
| Blood level of dihydrotestosterone | Day 3 | This dosage will be performed using a 1.5 ml blood sample taken for screening purpose (for routine systematic post natal screening) only in newborn over 35 WA |
| Blood level of delta4-androstenedione | Day 3 | This dosage will be performed using a 1.5 ml blood sample taken for screening purpose (for routine systematic post natal screening) only in newborn over 35 WA |
Countries
France
Contacts
Primary ContactClaire-Lise GAY, MD
Backup ContactCornu Catherine, MD
Outcome results
None listed