UNILABS REPRODUCCIÓN HUMANA

It is the figure closest to the question “what are my chances?”: the outcome of each transfer, in your age group. The woman’s age is the factor that weighs most on the result — which is why we never show a single overall rate.

The registry publishes every rate as an interval: the floor and the ceiling of the centre’s estimate. A wide interval usually means few cycles (more chance at play); a narrow one, more activity. Important: the Spanish registry publishes pregnancies, not live births — some pregnancies do not reach term, so this is not a birth rate. And each clinic treats different patients: comparing raw figures between centres can be misleading.

It measures the outcome embryo by embryo — the finest denominator the registry publishes: it lets you compare centres that transfer a different number of embryos per attempt.

It is calculated per embryo transferred, not per transfer: if two embryos are transferred and one implants, the transfer counts as a pregnancy, but implantation is 50%. The registry publishes it as an interval, without an age breakdown. It measures implantation, not a full-term pregnancy or a birth.

In egg donation the decisive factor is the donor’s age, not the recipient’s: that is why its rates are higher and more stable than IVF with own eggs, and why it is shown as a separate section — mixing them would be misleading.

Same measure as IVF with own oocytes (pregnancy per transfer, published as an interval), with eggs provided by a donor. “Fresh” and “frozen” refer to the embryos transferred. Here too the registry publishes pregnancies, not births.

It measures the outcome embryo by embryo — the finest denominator the registry publishes: it lets you compare centres that transfer a different number of embryos per attempt.

It is calculated per embryo transferred, not per transfer: if two embryos are transferred and one implants, the transfer counts as a pregnancy, but implantation is 50%. The registry publishes it as an interval, without an age breakdown. It measures implantation, not a full-term pregnancy or a birth.

Insemination is the least complex technique and also the one with the lowest probability per attempt: the measure is pregnancy per cycle started, not per transfer, because insemination involves no embryo transfer.

AIH means insemination with the partner’s sperm; AID, with donor sperm. The registry publishes the pregnancy percentage per cycle as an interval, stratified by the woman’s age (up to 2014, a single “under 40” band). These are recorded pregnancies, not births.