WordNet

preceding all others in time or space or degree; "the first house on the right"; "the first day of spring"; "his first political race"; "her first baby"; "the first time"; "the first meetings of the new party"; "the first phase of his training"
the first or highest in an ordering or series; "He wanted to be the first" (同)number_one
the first element in a countable series; "the first of the month" (同)number_one, number 1
an honours degree of the highest class (同)first-class honours degree
indicating the beginning unit in a series (同)1st
before anything else; "first we must consider the garter snake" (同)firstly, foremost, first of all, first off
the initial time; "when Felix first saw a garter snake" (同)for_the_first_time
ranking above all others; "was first in her class"; "the foremost figure among marine artists"; "the top graduate" (同)foremost, world-class
before another in time, space, or importance; "I was here first"; "lets do this job first"
highest in pitch or chief among parts or voices or instruments or orchestra sections; "first soprano"; "the first violin section"; "played first horn"
communication between individuals (同)social intercourse
any of various evergreen trees of the genus Abies; chiefly of upland areas (同)fir_tree, true fir
nonresinous wood of a fir tree

PrepTutorEJDIC

性交(sexual intercourse)
(順序・時間的に)『第1の』,1番目の;最初の / (階級・等級・重要度などが)『1番の』,第一級の,首席の,最も重要な / 『最初に』,まっ先に;1番目に,第1位に;初めて / (…するくらいなら)むしろ,いっそ(…のほうがいい)(rather, sooner) / 《通例the~》『最初のもの』;(月の)第1日;(時代の)第1年 / 《通例the~》初め,始まり / 〈U〉ファーストギヤ,低速ギヤ / 〈C〉《英》(競技などの)第1位,1等(試験の)第一級 / 《複数形で》最高級品,一級品 / 〈U〉=first base
(個人や帽団の間の)『交際』,交流,連絡,取引;(思想・気持ちなどの)(…との)相互交換,やりとり《+『between』(『with』)+『名』》 / =sexual intercourse
モミ,モミの木(クリスマスツリーに用いられる) / モミ材

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1. 思春期の性adolescent sexuality [show details]
… counseling is important for adolescents who may not fully report all risks and sexual behaviors. Because early age of first intercourse is a risk factor for pregnancy and STI acquisition, it is appropriate to …
2. 緩和ケアにおける性の問題sexuality in palliative care [show details]
… receptor-positive breast cancer report significant vaginal symptoms, which may interfere with intercourse. First-line treatment of symptoms of vaginal atrophy in women with breast cancer includes nonhormonal …
3. 性感染症：思春期に固有の問題sexually transmitted infections issues specific to adolescents [show details]
…STI within one year of first intercourse . Repeated infections were common. These findings highlight the need for initiation of STI screening within one year of first intercourse and of retesting individuals …
4. 男性性機能障害の概要overview of male sexual dysfunction [show details]
… men who reported intercourse less than once per week developed ED at twice the rate as men who reported intercourse once per week (79 versus 33/1000… first emerges as a common problem for men in their early 40s and increases with advancing age.…
5. 心血管疾患患者における性的活動sexual activity in patients with cardiovascular disease [show details]
… and risk associated with sexual intercourse was reinforced by the observations that patients with stable angina often noted chest discomfort during or immediately after intercourse. However, the results were …

English Journal

Pathways to early coital debut for adolescent girls: a recursive partitioning analysis.

Pearson MR, Kholodkov T, Henson JM, Impett EA.SourceDepartment of Psychology, Old Dominion University.
Journal of sex research.J Sex Res.2012 Jan;49(1):13-26. Epub 2011 May 24.
This study examined pathways to early coital debut among early to middle adolescent girls in the United States. In a two-year longitudinal study of 104 adolescent girls, recursive partitioning (RP) analyses were conducted to examine the specific factors that were related to engaging in first interco
PMID 21512947

Looking back: the experience of first sexual intercourse and current sexual adjustment in young heterosexual adults.

Reissing ED, Andruff HL, Wentland JJ.SourceSchool of Psychology, University of Ottawa, Ottawa, Ontario, Canada. elke.reissing@uottawa.ca
Journal of sex research.J Sex Res.2012 Jan;49(1):27-35. Epub 2011 May 24.
A young person's first consensual sexual intercourse experience is often a remarkable and memorable experience. However, little systematic information exists regarding contextual factors of first intercourse, the affective salience of the experience, possible effects on sexual attitudes and beliefs,
PMID 21161815

Japanese Journal

前立腺癌放射線外照射後の性機能の検討

菊地栄次,中島淳,安藤利行,長田浩彦,宮嶋哲,中川健,丸茂健,大家基嗣
日本泌尿器科學會雜誌 102(3), 575-580, 2011-05-20
(目的)前立腺癌の治療法の一つである放射線外照射に注目し,治療前後の性機能の変化を国際勃起機能スコア(Internal Index of Erectile Dysfunction:IIEF)日本語版を用いてprospectiveに追跡した.(対象と方法)2000年から2007年までに当院で前立腺癌に対して放射線外照射を施行し,治療前後でIIEF質問票による性機能評価が可能で,最低12ヵ月経過観察し …
NAID 110008661929

Clinical Symptoms and Courses of Primary HIV-1 Infection in Recent Years in Japan

Nakamura Hideta,Teruya Katsuji,Takano Misao,Tsukada Kunihisa,Tanuma Junko,Yazaki Hirohisa,Honda Haruhito,Honda Miwako,Gatanaga Hiroyuki,Kikuchi Yoshimi,Oka Shinichi
Internal Medicine 50(2), 95-101, 2011
… Results Ninety percent of the patients were infected via homosexual intercourse. … The mean CD4 count and viral load at first visit were 390/μL (±220.1) and 4.81 log10/mL (±0.78), respectively. … Among the patients with a CD4 count of <350/μL at first visit, 53% never showed recovery of CD4 count (>350/μL) without antiretroviral therapy. …
NAID 130000413205