Ivf (in vitro fertilization) is a more advanced form of art treatment in which female eggs are fertilized with male sperm inside the controlled laboratory environment to produce embryos. These embryos thus produced are transferred back to the uterus. The steps of a typical IVF cycle are:

Ovulation induction to produce multiple female eggs.

Ovum pickup: when eggs are mature they are collected inside the operation theatre under sonography guidance.
Fertilization: eggs thus collected are fertilized inside the IVF laboratory to produce embryos. Nowadays fertilization is done by the procedure called icsi as fertilization rates are higher with this procedure (around 70%).

Embryo transfer: embryos are grown inside the laboratory incubators for three or five days. Not all eggs that are fertilized become good quality embryos. The chances of making good quality embryos are around 50% (if 10 eggs are fertilized by icsi, only 5 may become good quality embryos). There are two methods for embryo transfer. One is fresh embryo transfer and the other is frozen embryo transfer. A fresh embryo transfer means your embryo is inserted into your uterus between three and seven days after the egg retrieval procedure. This embryo hasn’t been frozen and is “fresh.” a frozen embryo transfer means that frozen embryos (from a previous IVF cycle or donor eggs) are thawed and inserted into your uterus. This is a more common practice because this method is more likely to result in a live birth. Frozen embryo transfers can occur years after egg retrieval and fertilization.
Pregnancy occurs when the embryo implants itself into the lining of your uterus. Your doctor will use a blood test to determine if you’re pregnant approximately nine to 14 days after embryo transfer.