Helena E Virtanen
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Explore the profile of Helena E Virtanen including associated specialties, affiliations and a list of published articles.
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Recent Articles
11.
Syrjala E, Niinikoski H, Virtanen H, Ilonen J, Knip M, Hutri-Kahonen N, et al.
PLoS One
. 2021 Nov;
16(11):e0260137.
PMID: 34793547
Objective: Growth-based determination of pubertal onset timing would be cheap and practical. We aimed to determine this timing based on pubertal growth markers. Secondary aims were to estimate the differences...
12.
Rodprasert W, Toppari J, Virtanen H
Front Endocrinol (Lausanne)
. 2021 Oct;
12:706532.
PMID: 34690925
Male reproductive health has declined as indicated by increasing rates of cryptorchidism, i.e., undescended testis, poor semen quality, low serum testosterone level, and testicular cancer. Exposure to endocrine disrupting chemicals...
13.
Rodprasert W, Virtanen H, Makela J, Toppari J
Front Endocrinol (Lausanne)
. 2020 Feb;
10:906.
PMID: 32010061
Congenital cryptorchidism (undescended testis) is one of the most common congenital urogenital malformations in boys. Prevalence of cryptorchidism at birth among boys born with normal birth weight ranges from 1.8...
14.
Makela J, Koskenniemi J, Virtanen H, Toppari J
Endocr Rev
. 2018 Dec;
40(4):857-905.
PMID: 30590466
Production of sperm and androgens is the main function of the testis. This depends on normal development of both testicular somatic cells and germ cells. A genetic program initiated from...
15.
Sadov S, Virtanen H, Main K, Andersson A, Juul A, Jula A, et al.
Acta Paediatr
. 2018 Jun;
108(2):321-327.
PMID: 29953705
Aim: The aim was to assess the influence of dietary counselling on the pubertal development and hormonal status in healthy adolescents. Methods: We used a subcohort of 193 healthy boys...
16.
Koskenniemi J, Virtanen H, Wohlfahrt-Veje C, Loyttyniemi E, Skakkebaek N, Juul A, et al.
J Clin Endocrinol Metab
. 2018 Feb;
103(4):1429-1437.
PMID: 29408984
Context: Despite clinical guidelines calling for repetitive examination of testicular position during childhood, little is known of normal changes in testicular position during childhood, let alone factors that control it....
17.
Koskenniemi J, Virtanen H, Toppari J
Curr Opin Endocrinol Diabetes Obes
. 2017 Mar;
24(3):215-224.
PMID: 28248755
Purpose Of Review: To describe pubertal testicular growth in humans, changes in testicular cell populations that result in testicular growth, and the role of testosterone and gonadotrophins follicle-stimulating hormone (FSH)...
18.
Virtanen H, Jorgensen N, Toppari J
Nat Rev Urol
. 2017 Jan;
14(2):120-130.
PMID: 28050014
Although semen quality is an important determinant of fertility, defining clear thresholds for normal ranges has proven difficult. According to 'time to pregnancy' studies, fecundity starts to decline when sperm...
19.
Damsgaard J, Joensen U, Carlsen E, Erenpreiss J, Blomberg Jensen M, Matulevicius V, et al.
Eur Urol
. 2016 Sep;
71(2):e71-e72.
PMID: 27638092
No abstract available.
20.
Damsgaard J, Joensen U, Carlsen E, Erenpreiss J, Blomberg Jensen M, Matulevicius V, et al.
Eur Urol
. 2016 Jul;
70(6):1019-1029.
PMID: 27423503
Background: Present knowledge on the impact of varicoceles on testicular function is largely based on studies of subfertile and infertile men, making it difficult to extrapolate the impact of varicocele...