thanks for your query.
The Brevactid 5000 is HCG
which is generally given around ovulation to trigger ovulation
A second shot might be required if the follicle did not rupture with the first one, and more dose is needed.
It is also given in the luteal phase ( after ovulation ) to provide support to the growing embryo in case conception does occur
Utrogest is progesterone
which is also given as luteal phase support for the embryo.
So, please follow the instructions of your Infertility
all the best for your cycle