Related Experiment Video
Updated: Feb 11, 2026

Mouse Model of Surgical Uterine Injury and Subsequent Pregnancy Outcomes
Published on: June 27, 2025
Obstetric outcomes of elderly primiparous singleton pregnancies conceived by in vitro fertilization compared with
Shunji Suzuki1, Hidehiko Miyake1
1Department of Obstetrics and Gynecology, Japanese Red Cross Katsushika Maternity Hospital, Tokyo, Japan.
Abstract:
Aim: To examine the obstetric outcomes of elderly primiparous singleton pregnancies conceived by in vitro fertilization (IVF) compared with those conceived spontaneously. Methods: Data were collected from primiparous women aged 35 years and older with a singleton pregnancy conceived by IVF (n = 89) or spontaneously (n = 849). Data included antenatal data, gestational age at delivery, obstetric complications, such as pregnancy-induced hypertension, gestational diabetes, placental previa and placental abruption, mode of delivery, birth weight, fetal demise and the Apgar score at 1 min. Results: The elective Cesarean rate in pregnancies following IVF was significantly higher than that in the control group (P = 0.014). However, there were no significant differences in obstetric outcomes between the two groups. Conclusions: The current results did not support the IVF-related risks of elderly primiparous singleton pregnancies. (Reprod Med Biol 2007; 6: 219-222).
Related Concept Videos
In Vitro Fertilization
The IVF process begins with ovarian stimulation, during which reproductive endocrinologists prescribe hormonal medications to stimulate the ovaries to produce multiple eggs instead of the single...
Spontaneity
Fertilization
Predicting Reaction Outcomes
Outcomes of Glycolysis
Cellular respiration can occur aerobically (with oxygen) or anaerobically (without oxygen). In the presence of oxygen, cellular respiration starts with glycolysis and continues with pyruvate...
Spontaneous and Induced Mutations

