The hormone responsible for preparing the uterus for implantation of fertilized egg is :

Progesterone

The correct answer is option 1. Progesterone.

The hormone responsible for preparing the uterus for the implantation of a fertilized egg is Progesterone.

Role in Uterus Preparation: Progesterone is crucial in the menstrual cycle and early pregnancy. After ovulation, progesterone levels rise to prepare the uterine lining (endometrium) for the implantation of a fertilized egg. It ensures that the endometrium is thick, nutrient-rich, and ready to support a developing embryo.

Maintenance of Pregnancy: If fertilization occurs and implantation happens, progesterone continues to support the pregnancy by maintaining the uterine lining and preventing contractions that might expel the embryo.

Source: Progesterone is produced by the corpus luteum (the structure formed from the follicle after ovulation) and, later in pregnancy, by the placenta.

Other Hormones Listed

Testosterone: Testosterone is a male sex hormone responsible for the development of male reproductive tissues and secondary sexual characteristics. It is not involved in preparing the uterus for implantation.

Epinephrine (Adrenaline): Epinephrine is a hormone produced by the adrenal glands and is involved in the body's "fight or flight" response. It increases heart rate, blood pressure, and energy supplies but does not affect uterine preparation.

Norepinephrine: Norepinephrine is another hormone from the adrenal glands, similar to epinephrine, and also plays a role in the "fight or flight" response. It helps with alertness and regulating blood pressure but does not influence uterine preparation for implantation.

Summary

Progesterone is the hormone that plays a critical role in preparing the uterine lining for the implantation of a fertilized egg. It is essential for maintaining a pregnancy in its early stages.

Thus, the correct answer is: (1) Progesterone