Northwell Health Fertility IVF success rates

Non-donor cycles	<35	35-37	38-40	>40
Total number of cycles	686	478	434	418
Percentage of cycles for fertility preservation	10.6	13.0	6.2	2.9
Percentage of transfers using a gestational carrier	0.3	0.0	0.0	0.0
Number of retrievals	213	120	144	125
Number of transfers	218	107	96	62
Percentage of transfers resulting in live-birth deliveries	56.9	50.5	49.0	21.0
Fractions are used when the denominator is less than 20.

Donor cycles	Donor, fresh embryo, fresh egg	Donor, fresh embryo, frozen egg	Donor, frozen embryo	Donated embryo
Pct transfers resulting in live births	"/"	"8/18"	42.5	0.0
Fractions are used when the denominator is less than 20.

Reason for ART	Percentage
Pct cycles for banking reason	41%
Pct cycles for unexplained reason	27%
Pct cycles for male factor reason	19%
Pct cycles for other infertility reason	18%
Pct cycles for DOR reason	16%
Pct cycles for ovulatory dysfunction reason	11%
Pct cycles for tubal factor reason	9%
Pct cycles for recurrent pregnancy loss reason	7%
Pct cycles for endometriosis reason	4%
Pct cycles for PGT reason	4%
Pct cycles for uterine factor reason	2%
Pct cycles for gestational carrier reason	<1%
Pct cycles for other non-infertility reason	<1%
Fractions are used when the denominator is less than 20.

Dictionary

Total number of cycles: This is the number of ART cycles started in 2017 by age group and in total. The total number of ART cycles is calculated as the sum of (1) the number of cycles started with the intent to freeze all resulting eggs or embryos (for example, short term banking or fertility preservation); (2) the number of cycles started with the intent to transfer fresh or frozen eggs retrieved from either the patient or donor; and (3) the number of cycles started with the intent to transfer fresh or frozen embryos created from fresh or frozen eggs retrieved from either the patient or donor.

Pct cycles for fertility preservation: This is the percentage of all cycles that were intended for fertility preservation. These cycles include cycles that were started with the intent to freeze all retrieved eggs or embryos from the patient or a donor for use more than 12 months in the future. The denominator includes the total number of cycles as described above. The numerator includes all fertility preservation cycles.

Pct transfers using gestational carrier: This is the percentage of transfers in which the intended parent does not intend to carry the pregnancy but rather use a gestational carrier. A gestational carrier (also known as a gestational surrogate) is a woman who gestates an embryo that was formed from the egg of another woman with the expectation of returning the infant to its intended parent(s). The eggs or embryos can be either fresh or previously frozen and thawed and may come from either intended parents or donors. The denominator includes all cycles in which at least one egg or embryo was transferred. The numerator includes the total number of transfers in which the pregnancy carrier was a gestational carrier.

Number of retrievals: This is the number of ART cycles started in 2016 in which at least one egg was retrieved (actual retrieval) from the patient.

Number of transfers: This is the number of egg or embryo transfers where at least one egg was retrieved from the patient in 2016 and at least one egg or embryo was transferred within 12 months of the start of the cycle (in 2016 or 2017). The eggs or embryos can be either fresh or previously frozen and thawed.

Pct transfers resulting in live births: This is the percentage of egg or embryo transfers that resulted in a live birth. The denominator for this measure includes the number of transfers described above. The numerator includes the live birth(s) that resulted from the transfer(s) of eggs or embryos. For example, if 60 intended retrievals were associated with 58 transfers within 12 months, which resulted in 30 live births, the average success rate per transfer would be 30 (live births) ÷ 58 (transfers) = 0.517, or 51.7% of transfers resulting in a live birth.