Inclusion Criteria:  Willing and capable to provide informed consent Age > 18 years BMI < 50 (with no more than 4 cm between maternal skin and fetal skin) Gestational age > 36 weeks Singleton pregnancy Vertex presentation Active labor Category I or Category II tracings Ruptured amniotic sac with cervical dilation of >2 cm and a station of -2 or lower  Exclusion Criteria:  Age <18 years BMI > 50 third trimester Gestational age < 36 weeks Multiple gestation Nonvertex fetal presentation Suspected vasa previa Latent labor Category III CTG tracing (i.e., need for immediate delivery) Fetal anomalies and/or chromosomal disorders Chorioamnionitis Placenta Previa History of HIV, Genital Herpes, or other infection precluding internal monitoring Unable to provide informed consent (e.g., cognitively impaired)