Data:Pregnancy

Pregnancy risk

This is the base preganancy rate per age, expressed as how many women out of 100 who are trying to get pregnant will succeed per month assuming no birth control and a young, healthy partner.

age	success_per_month
0-20	0.08
21-30	0.06

Reference: .....

Pregnancy success also depends on the age of the father. This data table gives the fertility (expressed as a 0-100 range, where 100 is 100% fertility) of fathers by their age:

age_range	success_per_month
0-30	100
31-40	90

Reference: .....

Whether or not pregnancy occurs is also obviously depends on birth control methods. This table expresses approximately how effective various forms of birth control are, where effectiveness is expresses as 0-100 (100 being 100% effective):

method	effectiveness
none	0
rhythm	90
condom	95
IUD	99.9
tubal ligation	99.99

Putting it all together, the risk of getting preganant in a month is:

<risk_model name="pregnancy_risk_per_month"> AgeInterpolate(base_pregnancy_rate)* (AgeInterpolate(father_fertility_rate)/100)* (birth_control_effectiveness/100) </risk_model>

Women trying to get pregnant average about 10 sexual encounters per month, so the risk per sexual encounter is about:

<risk_model name="pregnancy_risk_per_encounter"> RiskModel(pregnancy_risk_per_month)/10 </risk_model>

{{#DropDown:title=ColumnTest|table=birth_control_effectiveness|text_column=method|value_column=effectiveness|sort=method}}