26.02.2015

Chances of pregnancy during period

If you've had unprotected sex and are wondering if you at risk of pregnancy, this tool from Planned Parenthood can help. In terms of your chances of getting pregnant on day 19 of your cycle, it depends on when you ovulated.
As this information relates to the Standard Days Method, if your cycles are in the 26-32 day range then your changes of getting pregnant from intercourse on day 19 are less than 5%. That said, if you wish to avoid pregnancy, it is encouraged that you avoid unprotected intercourse on days 8 through 19!
FERTILITY AWARENESS METHODSFAMs include all family planning methods based on the identification of the fertile time.4 This knowledge can be used to plan or avoid pregnancy. You can see a chart on this page which shows your chances for getting pregnant relative to the day you ovulate. For a woman it includes being able to identify the fertile time during her menstrual cycle. During family planning consultations, fertility awareness improves people's understanding about how each method of family planning prevents fertilization taking place and how if the method is not used correctly, then the risk of pregnancy will increase. For example, how the combined oral contraceptive pill prevents ovulation and makes the cervical secretions thick and impenetrable to sperm as well as understanding how fertility can quickly return if pills are not taken as directed.3This chapter focuses on how fertility awareness can be used as a method of family planning, either to achieve or to avoid pregnancy.
We can tell you that if you have sex and then ovulate 4 days later, your chances of getting pregnant are about 10-15%.
1 summarizes the physiological changes that occur during the menstrual cycle and the observed indicators of fertility.
The graph at the top of this page outlines probability of getting pregnant based on when you had intercourse relative to when you ovulated. However, current evidence suggests it is the same as the pregnancy rate for a single act of intercourse. Ergo, pregnancy from rape occurs as frequently as pregnancy from consensual sex.A lot of people are citing the Holmes et al (1996) paper that found a 5% pregnancy rate among rape survivors from 12 to 45 years of age.
This is a great study that performed several telephone interviews with 4008 participants over three years to determine rates of rape (413 individuals experienced 616 completed rapes, a lifetime incidence of over 13% in this sample) and rates of pregnancy from rape (20 were reported from 19 individuals, or 5%).In a separate study, Wilcox et al (2001) draw from their amazing prospective dataset from the 1980s where they asked women who were trying to conceive to collect urine every day.


They were able to detect hormones, and thus pregnancies and fetal losses, because of these daily urine collections.
Work on this dataset from Wilcox, Baird, and others represents the gold standard for our understanding of early pregnancy, fetal loss, and the timing of implantation in the luteal phase of the menstrual cycle. What Wilcox et al also does well is demonstrate first how the vulnerability to get pregnant varies across the cycle, but also how it is most certainly not zero at the times many of us assume we are not fertile.
To identify the fertile time during each menstrual cycle, it is essential to know the lifespan of the sperm in the female genital tract before ovulation, the timing of ovulation, and the length of time during which the ovum can be fertilized after ovulation.The lifespan of the sperm is up to 7 days. But only more studies will help us settle this.So, rape and consensual sex have the same pregnancy rate. This means that of those 64,080 US rapes in 2004-2005, minus the 15% of rapes that are of children under the age of 12 which gets us to 54,468 rapes of almost all reproductively-aged women, somewhere between 1,689 (3.1%) to 2,723 (5%) pregnancies from rape could have occurred in that year alone.
And so it is irrational to link the stress of rape, while awful and severe, to fetal loss, when we understand the mechanism of the stress response and its relationship to pregnancy so poorly, and when we know next to nothing regarding how variation in stress reactivity is produced.A legitimate word on preeclampsiaAnd then the always-brilliant Jeremy Yoder and Scicurious pointed me to an older post of Jesse Bering’s that he retweeted today in response to the Akin mess. In industrialized populations this can be done fairly easily, provided the preeclampsia isn’t too severe or the pregnancy is far along before symptoms develop. Probability of pregnancy relative to ovulation after intercourse on a given day of the cycle in women of different ages. The idea that preeclampsia could somehow be a pregnancy avoidance mechanism assumes that the rapist is not the woman’s partner, has not in fact had sex, consensual or not, with her for a number of years. It seems likely to me that the kinds of rape we have today are similar to the kinds of rape we had in the ancestral period.The science behind all of this is straightforward. When women have the right information they do not have to withstand the claim that they can’t get pregnant from rape, or it must not have been that stressful if they are pregnant.
Women and their children who have survived preeclampsia do not have to endure another man telling them that it is a mechanism to avoid rape, or that they could reduce their chances of preeclampsia next time if they’d only swallow.
Rape-related pregnancy: Estimates and descriptive characteristics from a national sample of women. Each of these indicators of fertility will change in response to the increasing and decreasing levels of estrogen and progesterone during the menstrual cycle.


These indicators may be used alone to identify the fertile time but are more commonly combined to improve the effectiveness to avoid a pregnancy.MONITORING BASAL BODY TEMPERATUREThis section describes the monitoring of basal body temperature as a single indicator to identify the fertile time. For couples planning a pregnancy, temperature recording is of no value in predicting ovulation. All the conceptions occurred during the fertile window extending from 5 days before to 1 day after the temperature rise. The chances of conception approximated to zero, 6 days before the day of the temperature rise, and 2 days after the temperature rise (Fig.
Secondary analysis42 of the data on cervical secretions from a large multinational European fecundability study assessed the relationship between the days predicted to be potentially fertile by the TwoDay Method and the day-specific probabilities of pregnancy based on 434 conception cycles. Palpating the cervix is rarely used alone as a single indicator, but the cervix changes are of particular value to women with long cycles, during breastfeeding when observing returning fertility, and during the perimenopausal years. The Standard Days method was derived from analyzing a large data set from a WHO study40 and estimating the theoretical probability of pregnancy on different days of the menstrual cycle.
13) designed to avoid pregnancy consists of a small hand-held electronic monitor and simple disposable urine test sticks. A full description of the study methods has been reported.52Luteinizing Hormone Sticks Urinary LH dipsticks are widely marketed toward women wishing to achieve a pregnancy. Some of the variable factors include the indicators of fertility used, the teaching methodology, the characteristics of the study population, new or experienced users, new or experienced teachers, the methods used to calculate the pregnancy rates, methods used to confirm pregnancies, intention to conceive, or avoid indicated at the beginning of the cycle.
Lamprecht and Trussel66 suggest that many FAM studies were flawed in design and did not calculate pregnancy rates correctly.
The study shows that couples who use barrier methods during the fertile time still take risks and have unprotected intercourse during the fertile time. The researchers conclude that FAMs are most unforgiving of imperfect use, but are extremely effective when either abstinence or protected intercourse is used during the fertile time.



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