Publications by authors named "Anita Nelson"

Introduction: Selective progesterone receptor modulators (SPRMs), such as mifepristone and ulipristal acetate (UPA), have demonstrated high efficacy and safety as single-dose treatments for medication abortion and emergency contraception (EC). Other obstetrical and gynecologic applications have emerged, both for episodic and ongoing uses. The potential of these compounds to provide estrogen-free, ongoing contraception is promising; however, the rare, but serious, hepatic injury cases seen with UPA have put at least a temporary halt to further research in this area.

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Protection against postpartum depression is a commonly cited maternal benefit of breastfeeding. However, recent studies have found that negative breastfeeding experiences may actually increase the risk of depressive symptoms. To investigate women's self-reported associations between breastfeeding experiences and depressive symptoms on a social media platform.

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Objective: We characterize microscopic ferning in pre-ejaculate samples with and without sperm.

Study Design: Healthy, male, withdrawal-experienced participants provided up to three paired pre-ejaculate and ejaculate samples. We centrifuged ejaculate samples to obtain a supernatant without sperm.

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Article Synopsis
  • The study aimed to evaluate pregnancy risk associated with the withdrawal method by analyzing sperm presence in pre-ejaculate samples from men experienced in this method.
  • It involved 24 male participants who provided paired samples of pre-ejaculate and ejaculate to measure sperm characteristics, with clinical pregnancy risk defined as having sperm concentrations over 1 million/mL.
  • The results showed that while some pre-ejaculate samples contained sperm, the concentrations were generally low and inconsistent, suggesting that the withdrawal method may be effective with proper use but needs more clinical research to confirm these findings.
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Introduction: The rates of home birth have been increasing; reliance on social media as a source of medical advice and support for patients has also been increasing. This is the first study that directly evaluates birthing people's perceptions, attitudes, and advice about planned home births expressed in public posts and comments on two popular social media platforms - Reddit and TikTok.

Methods: Posts on each platform were searched from January 2017 through July 2022 using the terms "home birth" and "home vs.

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Previous investigations of time-to-pregnancy recognition have analysed data from national surveys and clinics, but this has not been investigated in the context of digital fertility applications. Timely pregnancy recognition can help individuals in health and pregnancy management, reducing maternal and foetal risk and costs, whilst increasing treatment options, availability, and cost. This dataset contained 23,728 pregnancies (conceived between June 2018 and December 2022) from 20,429 participants using a Food and Drug Administration (FDA) cleared fertility app in the United States.

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Objectives: This study sought to determine if pharmacies in Los Angeles County had implemented 2017 legislation requiring insurance companies based in California to fully reimburse for 13 cycles of oral contraceptives dispensed at once.

Study Design: We conducted a secret shopper telephone survey of Los Angeles County pharmacies nearly 5 years after the legislation went into effect. We chose the categorical state family program (Family PACT) to represent all programs covered by the legislation.

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Introduction: Estetrol (E4) is a native estrogen produced only by the fetal liver during pregnancy. E4 is the first new estrogen to be used in hormonal contraception since the introduction of oral contraceptives in 1960. Ethinyl estradiol, the most commonly used estrogen in oral contraceptives today, increases the risks of thromboembolism and has other significant hepatic impacts, which induce important drug-drug interactions.

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We evaluated satisfaction with use of a segesterone acetate and ethinyl estradiol (0.15/0.013 mg) contraceptive vaginal system (CVS) among women who had recently used a monthly contraceptive vaginal ring or contraceptive pills.

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Premenstrual dysphoric disorder (PMDD) is a disabling disorder that impacts 1.8 percent to 5.8 percent of menstruating women for 1-2 weeks each month.

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Background: The most widely used copper intrauterine device (IUD) in the world (the TCu380A), and the only product available in many countries, causes side effects and early removals for many users. These problems are exacerbated in nulliparous women, who have smaller uterine cavities compared to parous women. We compared first-year continuation rates and reasons/probabilities for early removal of the TCu380A versus a smaller Belgian copper IUD among nulliparous users.

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Objectives: To describe ovulation inhibition and safety of daily oral ulipristal acetate (UPA) over 84 days.

Study Design: This multi-center phase 1 and/or 2 trial randomized participants to use oral ulipristal 10 mg or 5 mg daily or a 3 cycle regimen of 5 mg for 24 days followed by four placebo days. We stratified randomization by body mass index (BMI) <32 or 32-40 kg/m.

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Background: As war and famine are population level stressors that have been historically linked to menstrual cycle abnormalities, we hypothesized that the COVID-19 pandemic could similarly affect ovulation and menstruation among women.

Methodology: We conducted a retrospective cohort study examining changes in ovulation and menstruation among women using the Natural Cycles mobile tracking app. We compared de-identified cycle data from March-September 2019 (pre-pandemic) versus March-September 2020 (during pandemic) to determine differences in the proportion of users experiencing anovulation, abnormal cycle length, and prolonged menses, as well as population level changes in these parameters, while controlling for user-reported stress during the pandemic.

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A new low-dose, once-a-week contraceptive transdermal delivery system (TDS) with 2.3-mg ethinyl estradiol (EE) and 2.6-mg levonorgestrel (LNG; Twirla) has recently been approved by the US FDA for contraception of women with BMI <30 kg/m.

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Objective: To examine the rate of ovulatory disruption when intramuscular depot medroxyprogesterone acetate (DMPA) is administered across graded stages of dominant follicle development.

Study Design: We assigned enrolled participants to one of three preassigned dominant follicle size groups: 12-14 mm, 15-17 mm and ≥ 18 mm. We followed dominant follicles via serial transvaginal ultrasound (TVUS) until the follicles reached their assigned size, at which time we administered DMPA.

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Objective: To assess the contraceptive efficacy, safety, and tolerability of a contraceptive transdermal delivery system, (TDS; TWIRLA) containing levonorgestrel (LNG) and ethinyl estradiol (EE).

Study Design: This single-arm, open-label, multicenter, 1-year (13 cycle), phase 3 study enrolled sexually active women ≥18 years old at risk for pregnancy irrespective of body mass index (BMI). Women used patches in 28-day cycles (3 consecutive administrations of 7-day patches followed by 7 days off-treatment/patch-free week).

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Objective: To assess in parous and nulliparous women, the efficacy, safety, and tolerability of a new, low-dose copper (175 mm) intrauterine contraceptive with a flexible nitinol frame provided in a preloaded applicator.

Methods: Institutional review boards at 12 U.S.

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Underestimation of pregnancy-associated health risks could compromise informed decision-making and reduce demand for preconception care. We assessed the knowledge of pregnant women and male partners about several health risks posed by pregnancy to identify potential gaps in reproductive health literacy. Pregnant women and male partners were surveyed about their knowledge of seven common health risks associated with pregnancy (venous thromboembolism [VTE], diabetes, gallstones, hemorrhoids, hypertension [HTN], kidney infection, and anemia) in either English or Spanish in a prenatal clinic at Harbor-UCLA Medical Center in Torrance, California.

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