They found one in four women is very likely to become pregnant because of inconsistent contraception use.
Some of this gap is due to lack of access to health care, with many women saying they cannot afford some of the more effective methods of contraception such as birth control pills that require a doctor's visit and prescription.
Unwanted pregnancies in South Africa
In South Africa the picture is a lot different, and unwanted pregnancies are often the result of not using any contraceptives at all.
The programmes manager at Planned Parenthood Association of South Africa (PPASA), Nomalizo Tukwayo spoke to a group of South African woman currently undergoing unwanted pregnancies and reported the following results:
- Often male partners are reluctant to use a condom because, they say it lessens the sensation during sex, is uncomfortable, or may cause a partner to be suspicious of the other – thinking that they might be having an affair.
- Access to clinic facilities also restricts the use of contraceptives. Sometimes women have to travel far to reach a clinic, and often the queues are long and service is slow. It could take a woman as long as a day to get contraceptives.
- A lot of woman also feel that oral or injected contraceptives have negative side effects, such as making you gain weight, or feel ill.
Understanding women's situations
"It is critical to have a better understanding of what is preventing women from using contraception consistently and correctly, or even at all," Dr Jennifer Frost, a senior research associate at Guttmacher, said in statement.
Research for the US study involved surveys of women and family planning providers nationwide. Among the results, they found that more than half of women who have a gap in contraceptive use of at least one month have experienced some type of major life event - such as the end of a relationship, a move, job change or personal crisis.
A similar study in South Africa among teen and adolescent girls found that a small number of young female respondents planned the pregnancy because their partners wanted a child (33.3 percent), or they wanted to secure the relationship (30.3 percent) and in some cases (12.1 percent) they even became pregnant to receive a child support grant, according to the PPASA's Teen Parent Programme Report.
It also determined that among those who didn't plan their pregnancies, 30.6 percent were because of method failure, 19.5 percent because of not using contraception and 19.8 percent of unwanted pregnancies were because of peer pressure.
Unhappy with current method
The US study also found that many women are not satisfied with their current method of contraception, a problem that can lead to missing birth control pills or failure to keep a condom handy, for example.
Last month the National Centre for Health Statistics reported there were almost 6.4 million pregnancies in 2004, down 6 percent from 1990. Forty-five percent were to women who were not married, and there were 1.22 million abortions and 1.06 million stillbirths and miscarriages.
The researchers also found that many women who are lax about birth control are simply ambivalent about preventing a pregnancy and confessed that they would be very pleased if they found out they were pregnant.
The researchers said women who are the least motivated to avoid pregnancy are far less likely to use birth control pills, or any contraceptive method at all on a consistent basis.
They said a woman's attitude toward pregnancy, her satisfaction with her method and her experiences with gynaecologists and other providers of contraception play a far bigger role in a woman's risk of pregnancy than other major risks, such as poor education and poverty.
Frost said doctors and other health providers should start by helping women to find the best contraceptive method for them.
"The more we can remove the remaining barriers to consistent use, the better we will be at ensuring that all women can avoid unwanted pregnancies and plan the children they want, when they want them," Frost said. – (Health24/Reuters Health)