Thymus( lymphocytes), Corpus luteum( progesterone), Placenta( hCG,Estrogen, progestrogen) are temporary endocrine glands.

Temporary Endocrine Gland in Human Body
The temporary endocrine gland in the human body is the corpus luteum. This gland forms in the ovary after ovulation occurs and plays a crucial role in the menstrual cycle and early pregnancy.

Formation and Function
- The corpus luteum is formed from the ruptured follicle after ovulation.
- It secretes hormones such as progesterone, which helps prepare the uterus for a potential pregnancy.
- Progesterone also helps maintain the uterine lining to support embryo implantation.

Duration and Disappearance
- The corpus luteum typically lasts for around 14 days if pregnancy does not occur.
- If fertilization does not happen, the corpus luteum degenerates, leading to a decrease in hormone production.
- This decrease in hormone levels triggers menstruation and the shedding of the uterine lining.

Importance in Pregnancy
- If fertilization does occur, the corpus luteum continues to produce hormones to support the early stages of pregnancy.
- Around the 10th week of pregnancy, the placenta takes over hormone production, and the corpus luteum degenerates.
In conclusion, the corpus luteum is a crucial temporary endocrine gland in the human body that plays a vital role in the menstrual cycle and early pregnancy. Its formation, function, duration, and disappearance are all essential aspects of reproductive health in females.