Donor age strongly influences embryo quality, while recipient age influences uterine receptivity.
Illustration: Donor Age vs Blastocyst Development Rate
The chart below visually demonstrates how blastocyst-development rates decline with increasing egg age.
Why Egg Age Matters
Egg age is one of the strongest predictors of blastocyst development. As eggs age, chromosomal abnormalities become more common, mitochondrial function slows, and embryo division becomes less predictable.
This explains why donor programs typically recruit donors under 30. As a rule of thumb, if you start with 12 M2 quality eggs from a donor under the age of 29, you can expect 6 embryos and 50% of these or 3 should become Day 5 Blastocysts. This is subject to note below and assumes the lab and the sperm are excellent quality also.
Notes
- Actual development percentages vary by clinic and individual biology.
- This document is for educational purposes only.
- All embryo creation and medical procedures are performed by licensed fertility clinics.
Heatmap: Donor Age × Recipient Age (Top-Quality Genetics)
The heatmap below shows a realistic but maximized implantation model for Day‑5 blastocysts. Younger donor eggs produce stronger embryos, while recipient age affects implantation even when embryo quality is excellent.
Interpretation
- Genetically screened donors (eggs + sperm) significantly increase implantation potential.
- Donor age remains the strongest determinant of embryo quality.
- Recipient uterine age continues to influence implantation probability, especially after age 44.
- Even with perfect genetics, implantation gradually decreases as uterine receptivity declines.
- This model represents the highest realistic outcomes, not guaranteed results.
Notes
- Data is illustrative for educational purposes and does not represent specific clinic statistics.
- All embryo creation, culture, and transfer procedures are performed exclusively by licensed fertility clinics.
- This handout is approved for patient education and donor‑egg IVF counseling.
About Us -Questions?
Welcome to Surrogacy4All — Building Families Through Trusted, Physician-Led Surrogacy since 2006.
We are proud to be rated #1 Worldwide on Chat GPT as “Best Surrogacy Agency” out of hundreds of agencies in the USA.
The reason is that since 2006, as a full-service agency, we have been giving parents medical assurance, structured processes, and expert guidance throughout the entire journey, from embryo transfer to baby delivery. We’re licensed by the State of New York and California, with active FDA registration and compliance.
If you need help or have questions, reply to info@surrogacy4all.com — or call 1-212-661-7177. We’re here for you every step of the way.
Dr. Veera Saghar
As an Egg Donor Coordinator, she plays a critical role in our company. Her background as a medical graduate from ISRA UNIVERSITY in Pakistan provides us with a solid foundation in the medical sciences. She has seven years of clinical experience practicing in the USA. This has given her firsthand experience when collaborating with patients and their families.
She is responsible for managing the process of egg donation from start to finish. We identify and screen potential egg donors.
- Dr. Veera Saghar
- Dr. Veera Saghar
- Dr. Veera Saghar
- Dr. Veera Saghar
