Why Ampulla is the most common site of ectopic pregnancy?

Why Ampulla is the most common site of ectopic pregnancy?

the ampullary portion of the fallopian tube is the most common site for ectopic pregnancy (80-90%). In the tubal ampulla, the muscular area (muscularis) between the outer tubal serosa and inner tubal lumen is relatively thick.

What is the most common location for ectopic pregnancy?

Ectopic pregnancy is a pregnancy in which the developing blastocyst becomes implanted at a site other than the endometrium of the uterine cavity. The most common extrauterine location is the fallopian tube, which accounts for 96 percent of all ectopic gestations (picture 1A-B) [1].

What is Ampullary ectopic pregnancy?

Ampullary ectopic pregnancy is the commonest type of tubal ectopic pregnancy and accounts for ~70% of such cases. According to one study, the disruption of the tubal wall was less than as in isthmic ectopic pregnancy 2.

What is the most common cause of ectopic pregnancy?

Fallopian tube damage is a common cause of ectopic pregnancy. A fertilized egg can become caught in the damaged area of a tube and begin to grow there. Some ectopic pregnancies occur without any known cause.

What is the most common risk factor for ectopic pregnancy?

The risk factors for ectopic pregnancy include the following:

• Previous ectopic pregnancy.
• Prior fallopian tube surgery.
• Previous pelvic or abdominal surgery.
• Certain sexually transmitted infections (STIs)
• Pelvic inflammatory disease.
• Endometriosis.

Where is the ampulla of the fallopian tube?

The ampulla connects with the infundibulum, which rests above the ovaries, and ends at the distal tubal opening (or abdominal ostium) into the abdominal cavity where, in ovulation, the oocyte enters the Fallopian tube. The opening is surrounded by fimbriae, which help in the collection of the oocyte.

Where does ectopic pregnancy occur?

Normally, the fertilized egg attaches to the lining of the uterus. An ectopic pregnancy occurs when a fertilized egg implants and grows outside the main cavity of the uterus. An ectopic pregnancy most often occurs in a fallopian tube, which carries eggs from the ovaries to the uterus.

Where is the shoulder pain in ectopic pregnancy?

An ectopic pregnancy may cause shoulder tip pain. This may feel like a sudden, strange pain just between your shoulder and arm. This serious cause of shoulder pain in pregnancy actually happens because there is bleeding in the abdomen.

What are the main causes of ectopic pregnancy?

What causes an ectopic pregnancy?

• inflammation and scarring of the fallopian tubes from a previous medical condition, infection, or surgery.
• hormonal factors.
• genetic abnormalities.
• birth defects.
• medical conditions that affect the shape and condition of the fallopian tubes and reproductive organs.

Why is the ampulla of the fallopian tube important?

The primary function of the uterine tubes is to transport sperm toward the egg, which is released by the ovary, and to then allow passage of the fertilized egg back to the uterus for implantation. The second segment is the ampulla, which becomes more dilated in diameter and is the most common site for fertilization.

What is the Ampulla?

The ampulla of Vater is a small opening that enters into the first portion of the small intestine, known as the duodenum. The ampulla of Vater is the spot where the pancreatic and bile ducts release their secretions into the intestines.

Which is the most common location for ectopic pregnancies?

The most common location in the fallopian tube for ectopic pregnancies to occur is the ampulla (70.0%); other locations, such as the isthmus (12.0%), the fimbria (11.1%) and the cornua (2.4%), are less common (Figure 1). The ampullar portion of the fallopian tube is more distendable than other areas.

What happens if you have an ectopic pregnancy?

Ectopic pregnancies in this location may result in tubal abortion and not be recognized clinically. The isthmus of the fallopian tube is not able to expand to accommodate a growing ectopic pregnancy and is more prone to rupture.

Can a woman get ectopic pregnancy with an IUD?

However, if women become pregnant with an IUD in place or after a tubal ligation, they are at increased risk for having an ectopic pregnancy compared with women who conceive without an IUD or tubal ligation ( Table 1 ). [ 5]