Contraceptive — Reddit Tracker

How mentions are counted: Posts are scraped from 19 subreddits: r/birthcontrol (primary, 200 posts), plus r/contraception, r/TwoXChromosomes, r/AskWomen, r/AskDocs, r/PCOS, r/TryingForABaby, r/BabyBumps, r/childfree, r/sex (200 each), and r/WomensHealth, r/obgyn, r/Healthyhooha, r/Periods, r/Endo, r/abortion, r/prochoice, r/prolife, r/FAMnNFP (100 each). Both /new and /hot sort orders are scraped per sub for broader coverage. Each post title and body text is scanned against 45 regex patterns — one per contraceptive type, including common misspellings and slang (e.g., "merina" → Mirena, "paraguard" → Paragard, "copper T" → Paragard, "bc shot" → Depo-Provera). Mentions are counted at the post level only — a post is counted for a contraceptive type if the post's own title or body text matches the regex. Comment text is analyzed separately for side effects and sentiment but does not add to the mentions table. The "IUD (general)" category uses a negative lookahead to avoid double-counting when a specific brand is also named. Cross-posted content is detected and deduplicated — a cross-post's mentions are not counted separately from its parent. Counts reflect the number of unique posts mentioning each type, not total word occurrences. A post that discusses multiple methods (e.g., "switching from Mirena to Nexplanon") is counted once for each type it mentions.

Keyword-based sentiment scoring: Each post and comment (across all 19 subreddits) is scored from -1.0 (very negative) to +1.0 (very positive) using curated word lists:

• ~40 positive words (love, recommend, effective, relief, helped, works, etc.)
• ~50 negative words (hate, pain, nightmare, frustrated, scared, bleeding, etc.)
• Negators (not, never, don't, etc.) flip the next word's polarity — "not painful" counts as positive
• Intensifiers (very, extremely, so) multiply the next word's weight by 1.5x

Score formula: (positive - negative) / total_sentiment_words, clamped to [-1, 1]. The chart shows the average score across all posts mentioning each type. Posts with no sentiment words score NULL and are excluded — this means the post count here may be lower than in the Mentions chart (e.g., a title-only post like "Copper IUD and Slynd at the same time" contains no positive/negative words and is omitted). Use the subreddit filter to compare sentiment across communities. This is best for comparing trends between types, not interpreting individual posts — it cannot detect sarcasm, context, or complex phrasing.

Ranked side-effect mentions: Counts the number of unique posts and comments (across all 19 subreddits) that match each of the 24 side-effect regex patterns. A single post mentioning "cramps" and "bleeding" counts once for each category. Patterns include variations (e.g., "headache" and "migraine" both map to "Headaches"). This tracks what people are talking about, not necessarily what they experienced — questions, fears, and reports all count equally.

Health literacy gap detection: Posts and comments are scanned against 20 proximity-bounded regex patterns sourced from WHO, ACOG, CDC, and Planned Parenthood myth lists, in 3 categories: Safety (IUDs cause abortions, BC causes infertility, Plan B is abortion, BC causes cancer, hormonal BC permanently changes you, IUD gets lost in body, need kids before IUD, copper IUD is toxic), Efficacy (pulling out equally effective, condoms don't work, can't get pregnant on period/breastfeeding/first time, natural methods equally effective, douching prevents pregnancy, two condoms are safer, antibiotics make all BC fail, spermicide alone is reliable), Mechanism (need breaks from pill, must take pill at exact same time). Each pattern requires co-occurrence of two concepts within a bounded character window (typically 30–80 characters) to prevent false positives from distant, unrelated mentions. Patterns are tuned for specificity: e.g., “Plan B is abortion” requires equating language (not just co-mention), “IUD gets lost in body” requires migration verbs (not the word “lost” alone). Stance detection: Each match is classified by analyzing a 150-character context window and sentence boundaries around the regex match for linguistic cues: ■ asserting (definitive language: “trust me,” “causes,” “obviously”), ■ questioning (uncertainty: “is it true,” “I heard,” question marks), ■ debunking (corrective: “myth,” “not true,” “misconception,” “no evidence”), ■ unclear (insufficient context). Bar chart segments are colored by stance when available. Sources: WHO Family Planning Handbook, ACOG Practice Bulletins, CDC MMWR, Planned Parenthood.

Question detection: Post titles are scanned for question indicators (contains "?" or starts with question words like "has anyone", "is it", "does", "how", "what", etc.). Detected questions are categorized into 6 types by matching the title + body against keyword patterns: Side effects/Safety (side effects, safety, specific symptoms), Effectiveness (effectiveness, pregnancy risk, failure rates), Usage (how to use, missed doses, insertion/removal), Access/Cost (cost, insurance, prescriptions, clinics), Experience (personal experiences, recommendations, advice), Switching (changing methods, alternatives). A question can belong to multiple categories. Limitation: Only post titles are checked for question detection; body text is used for categorization only.

Self-reported age and gender extraction: Reddit users commonly self-report demographics in posts (e.g., "I'm 23F", "(25F)", "26 year old woman"). The system scans the first 500 characters of each post through 7 ordered regex patterns (most specific first): 1. "I'm 23F" / "I am 23F", 2. "(23F)" / "[23F]", 3. "23F here", 4. "23 year old female/woman/man", 5. "I'm a 23 year old" (age only), 6. "I'm female" / "I'm a woman" (gender only), 7. "I'm 23 years old" (age only). A third-person filter skips matches preceded by "my girlfriend", "my partner", etc. within 30 characters. Age range: 13–65. Gender maps to female/male/null. Posts only (not comments). Limitation: Non-binary genders map to null.

Grouped contraceptive categories: Individual types are grouped into 8 categories: IUDs (Mirena, Kyleena, Liletta, Skyla, Paragard, IUD general), Pills (Combined, Mini, general, Slynd, Opill, Yaz, Lo Loestrin, Ortho Tri-Cyclen, Junel, Seasonique, Sprintec, Alesse/Aviane, Nordette/Portia, Apri/Desogen, Nextstellis, Natazia), Long-acting (Nexplanon, Depo-Provera), Barrier/Other (Condoms, NuvaRing, Xulane patch, Spermicide, Diaphragm, Phexxi), Emergency (Plan B), FAM/NFP (Billings, BBT, Symptothermal, Standard Days, Calendar/Rhythm, LAM, FAM/NFP general), FAM/NFP (app-based) (Natural Cycles, Kindara, Read Your Body, Tempdrop, Daysy, Ava bracelet, Oura, Femometer), Withdrawal. The chart sums mention counts within each group.