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Wskaźnik Pearla

aniolekdiabelek | 11 Sierpień, 2008 19:27

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Skuteczność metod antykoncepcji ocenia się za pomocą wskaźnika opracowanego w 1933 roku przez Raymonda Pearla , określa ilość ciąż wśród setki kobiet stosujących daną metodę antykoncepcyjną w ciągu roku. Czyli wskaźnik 5 będzie oznaczał, że na 100 kobiet, które stosowały daną metodę przez cały rok tylko 5 zaszło w ciążę (albo aż 5). Im więc wskaźnik niższy, tym metoda skuteczniejsza. Poniższa tabelka przedstawia zestawienie porównanie wskaźników Pearla dla poszczególnych metod. Występujące często duże różnice w ocenie danej metody spowodowane są najczęściej różną znajomością techniki i dbałością w stosowaniu. Można przyjąć, że im lepsza znajomość teorii dotyczącej danej metody i większa dokładność w praktyce tym efekt lepszy, czyli wskaźnik Pearla niższy.

"Typowego stosowania" oznacza, że metoda nie zawsze była stosowana prawidłowo lub nie podczas wszystkich stosunków (np. zapomniana pigułka prowadząca do zapłodnienia) lub były stosowane prawidłowo, ale mimo to zawiodły
"Idealnego stosowania" oznacza, że metoda zawsze była stosowana prawidłowo i podczas każdego stosunku, a pomimo to zawiodła (np. pojawiająca się ciąża choć tabletka antykoncepcyjna była prawidłowo stosowana)

Metoda

Wskaźnik Pearla
dla "typowego stosowania"

Wskaźnik Pearla
dla "idealnego stosowania"

Sterylizacja

Sterylizacja męska

0.15

0.10

Sterylizacja kobieca

0.5

0.5

Antykoncepcja hormonalna

Implanty (Norplant)

0.09

0.09

Iniekcje hormonalne (Depo-Provera)

0.3

0.3

Tabletki antykoncepcyjne
(Estrogen/Progesteron)

5

0.1

Minipigułki (Cerazette)

5

0.5

Wkładki wewnątrzmaciczne (IUDs):

Copper T

0.8

0.6

Progesterone T

2

1.5

Mechaniczne:

Prezerwatywa męska1

14

3

Diafragma2

20

6

Gąbka dopochwowa
(u nierodzącej uprzednio)3

20

9

Gąbka dopochwowa
(u rodzącej uprzednio)3

40

20

Kapturek naszyjkowy
(u nierodzącej uprzednio)2

20

9

Kapturek naszyjkowy
(u rodzącej uprzednio)2

40

26

Prezerwatywa kobieca

21

5

Chemiczne:
(pianki, żele, globulki)

26

6

Metody naturalne:

Stosunek przerywany

19

4

Naturalne Metody Planowania Rodziny
(kalendarzyk, termiczna, objawowa)

25

1-9

Bez stosowania antykoncepcji

85

85 

1 Używane bez dodatków środków plemnikobójczych
2 Używane w połączeniu ze środkami plemnikobójczymi
3 Zawiera środki plemnikobójcze

Normal 0 21 false false false PL X-NONE X-NONE

Prawdopodobieństwo zajścia

 

 

Prawdopodobieństwo zajścia w ciążę 
w zależności od dnia stosunku

dzień 0 oznacza owulację

 -5

-4

-3

-2

-1

0

1

2

3

0%

11%

15%

20%

26%

15%

9%

5%

0%

 

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