One of the first questions most couples ask when considering IVF is about success rates, and it is also one of the most misunderstood figures in fertility medicine. Numbers vary widely across clinics, age groups, and reporting methods, making direct comparisons difficult without the right context.
Several factors determine how likely IVF is to work for any individual couple, and many of them are within reach of meaningful improvement before a cycle even begins.
Two metrics are commonly used: the clinical pregnancy rate, which measures a positive heartbeat confirmed on scan, and the live birth rate, which measures a baby actually born. These are significantly different figures, and the gap between them matters.
India follows ICMR guidelines for ART reporting, and Nova IVF reports success rates per egg retrieval cycle rather than per embryo transfer. This is a more transparent and clinically honest measure, as it accounts for cycles where transfer may not be possible due to embryo quality or uterine readiness.
Age is the single most influential variable in IVF outcomes. The table below reflects current Indian clinical averages using own eggs.
| Age Group | Approximate Success Rate (per cycle) |
|---|---|
| Under 35 | 40 to 50% |
| 35 to 37 | 35 to 42% |
| 38 to 40 | 25 to 35% |
| 41 to 42 | 15 to 25% |
| Above 42 | 5 to 15% |
The decline above 35 is primarily driven by a reduction in egg quantity and quality, an increase in chromosomal abnormalities, and a higher rate of early miscarriage.
Under ICMR guidelines, IVF using a woman's own eggs is generally available up to age 50, though most clinics recommend completing treatment by 45. Beyond 40, donor egg IVF is frequently recommended as success rates with own eggs decline considerably.
Age is one factor, not the only one. Ovarian reserve, uterine health, sperm quality, and overall metabolic health all contribute to outcomes.
Each of the following factors influences outcomes directly and independently:
Reading your hormone panel before starting IVF provides a foundational view of ovarian reserve and helps set realistic expectations before stimulation begins.

IVF success is influenced by certain key variables:
Analyzing your hormone profile prior to undergoing IVF helps evaluate your ovarian reserve and set appropriate expectations.
There are a few key things you can work on before starting IVF that can directly improve your chances.
At Nova IVF, all these factors are reviewed together before starting treatment, so the plan is tailored to the individual rather than following a fixed protocol.
For women under 35, IVF success rates in the first cycle are around 40–50%, depending on ovarian reserve, embryo quality, and uterine receptivity.
Yes, IVF can work after 40, but success declines with age. Techniques like PGT-A, blastocyst transfer, and donor eggs improve outcomes significantly in older women.
Most IVF pregnancies occur within three cycles, with cumulative success rates reaching 65–80% in women under 38 at experienced fertility centres.
Yes, egg quality improves with proper care during the 90-day pre-IVF window, including nutrition, stress control, and supplements, leading to better embryo development outcomes.