Physical and mental development of children after in vitro fertilization and embryo transfer

Area of Science:

• Reproductive Medicine
• Pediatric Development
• Assisted Reproductive Technology (ART)

Background:

• Assisted reproductive technology (ART) methods like in vitro fertilization (IVF) and frozen embryo transfer (FET) are widely used.
• Concerns exist regarding the long-term physical and mental development of children conceived through ART.

Purpose of the Study:

• To evaluate and compare the physical and mental development of children conceived via IVF and FET.
• To assess developmental outcomes based on different ART procedures (ICSI, conventional IVF, FET) and birth multiplicity (singleton, twin, triplet).

Main Methods:

• A survey was conducted using questionnaires mailed to parents of 658 babies born after IVF/ET treatments between 1995 and 2003.
• Developmental milestones were compared between children conceived via ICSI, conventional IVF, FET, and naturally conceived children.
• Outcomes were analyzed for singletons, twins, and triplets.

Main Results:

• ART children had lower birth weight and height compared to naturally conceived babies.
• Singleton ART children showed no significant developmental differences from naturally conceived children in physical or mental development.
• Multiple births conceived via ART exhibited delayed physical development milestones, but this difference diminished by six months of age.

Conclusions:

• While initial birth measurements may be lower, singleton children conceived via ART develop comparably to naturally conceived peers.
• Multiple births resulting from ART may experience temporary developmental delays, particularly in physical milestones.
• The study suggests that ART methods do not lead to long-term developmental deficits in singletons and that delays in multiples are transient.