17 Aug Question: For Questions 1 And 2: Ectopic Pregnancy Occurs When A Fertilized Egg Implants Outside The Uterus. In About 95% Of Cases, Implantation Occurs In The Fallopian Tube. The Fertilized Can Also Implant In The Ovary, Cervix Or Abdomen. Implantation In The Fallopian Tube Usually Results In Rupture Of The Tube And Hemorrhage Which Can Be Fatal. Most Ectopic …
For Questions 1 and 2: Ectopic pregnancy occurs when a fertilized egg implants outside the uterus. In about 95% of cases, implantation occurs in the fallopian tube. The fertilized can also implant in the ovary, cervix or abdomen. Implantation in the fallopian tube usually results in rupture of the tube and hemorrhage which can be fatal. Most ectopic pregnancies never develop into live birth since implantation outside the uterus deprives the fetus of the nurturing environment needed for development.
The following data gives some descriptive epidemiology of ectopic pregnancy in the United States.
Table 1: Number and prevalence of Ectopic Pregnancy by Year – United States, 1970 – 1992
|
Year |
Number |
Prevalence (per 1000 reported pregnancies) |
|
1970 |
17,800 |
4.5 |
|
1975 |
30,500 |
7.6 |
|
1980 |
52,200 |
10.5 |
|
1985 |
78,400 |
15.2 |
|
1989 |
88,400 |
16.0 |
|
1992 |
108,800 |
19.7 |
Table 2: Prevalence of Ectopic Pregnancy by Race and Age – United States, 1970-1989
Race Age group (yrs) Prevalence per 1000 reported pregnancies White 15-24 6.1 25-34 13.7 35-44 19.0 All ages, 15-44 10.3 Black & other 5-24 8.2 25-34 22.6 35-44 30.1 All ages, 15-44 14.7 All races 15-24 6.6 25-34 15.4 35-44 21.5 All ages, 15-44 11.3
Surveillance for ectopic pregnancy – United States, 1970-1989. MMWR 1993: 42:73-85
Current trends in ectopic pregnancy – United States, 1990-1992. MMWR. 1995; 44:46-48
Based on the data, which best describes:
- The change in disease from 1970 to 1992:
- a) The prevalence rate increased by about 300% between 1970 and 1992
- b) The prevalence rate increased by about 500% between 1970 and 1992
- c) The prevalence rate decreased by about 200% between 1970 and 1992
- The difference in prevalence between whites and blacks
- a) Black women have a prevalence rate higher by a factor of 1.4 compared to whites
- b) White women have a prevalence rate lower by a factor of 0.7 compared to blacks
- c) Both A and B are true
- d) Neither A or B are true
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